diff --git a/objectivec/GPBUtilities.h b/objectivec/GPBUtilities.h
new file mode 100644
index 0000000..5b55104
--- /dev/null
+++ b/objectivec/GPBUtilities.h
@@ -0,0 +1,187 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2008 Google Inc.  All rights reserved.
+// https://developers.google.com/protocol-buffers/
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#import <Foundation/Foundation.h>
+
+#import "GPBArray.h"
+#import "GPBMessage.h"
+#import "GPBRuntimeTypes.h"
+
+CF_EXTERN_C_BEGIN
+
+NS_ASSUME_NONNULL_BEGIN
+
+// Generates a string that should be a valid "Text Format" for the C++ version
+// of Protocol Buffers. lineIndent can be nil if no additional line indent is
+// needed. The comments provide the names according to the ObjC library, they
+// most likely won't exactly match the original .proto file.
+NSString *GPBTextFormatForMessage(GPBMessage *message,
+                                  NSString * __nullable lineIndent);
+NSString *GPBTextFormatForUnknownFieldSet(GPBUnknownFieldSet * __nullable unknownSet,
+                                          NSString * __nullable lineIndent);
+
+//
+// Test if the given field is set on a message.
+//
+BOOL GPBMessageHasFieldNumberSet(GPBMessage *self, uint32_t fieldNumber);
+BOOL GPBMessageHasFieldSet(GPBMessage *self, GPBFieldDescriptor *field);
+
+//
+// Clear the given field of a message.
+//
+void GPBClearMessageField(GPBMessage *self, GPBFieldDescriptor *field);
+
+//%PDDM-EXPAND GPB_ACCESSORS()
+// This block of code is generated, do not edit it directly.
+
+
+//
+// Get/Set the given field of a message.
+//
+
+// Single Fields
+
+NSData *GPBGetMessageBytesField(GPBMessage *self, GPBFieldDescriptor *field);
+void GPBSetMessageBytesField(GPBMessage *self, GPBFieldDescriptor *field, NSData *value);
+
+NSString *GPBGetMessageStringField(GPBMessage *self, GPBFieldDescriptor *field);
+void GPBSetMessageStringField(GPBMessage *self, GPBFieldDescriptor *field, NSString *value);
+
+GPBMessage *GPBGetMessageMessageField(GPBMessage *self, GPBFieldDescriptor *field);
+void GPBSetMessageMessageField(GPBMessage *self, GPBFieldDescriptor *field, GPBMessage *value);
+
+GPBMessage *GPBGetMessageGroupField(GPBMessage *self, GPBFieldDescriptor *field);
+void GPBSetMessageGroupField(GPBMessage *self, GPBFieldDescriptor *field, GPBMessage *value);
+
+BOOL GPBGetMessageBoolField(GPBMessage *self, GPBFieldDescriptor *field);
+void GPBSetMessageBoolField(GPBMessage *self, GPBFieldDescriptor *field, BOOL value);
+
+int32_t GPBGetMessageInt32Field(GPBMessage *self, GPBFieldDescriptor *field);
+void GPBSetMessageInt32Field(GPBMessage *self, GPBFieldDescriptor *field, int32_t value);
+
+uint32_t GPBGetMessageUInt32Field(GPBMessage *self, GPBFieldDescriptor *field);
+void GPBSetMessageUInt32Field(GPBMessage *self, GPBFieldDescriptor *field, uint32_t value);
+
+int64_t GPBGetMessageInt64Field(GPBMessage *self, GPBFieldDescriptor *field);
+void GPBSetMessageInt64Field(GPBMessage *self, GPBFieldDescriptor *field, int64_t value);
+
+uint64_t GPBGetMessageUInt64Field(GPBMessage *self, GPBFieldDescriptor *field);
+void GPBSetMessageUInt64Field(GPBMessage *self, GPBFieldDescriptor *field, uint64_t value);
+
+float GPBGetMessageFloatField(GPBMessage *self, GPBFieldDescriptor *field);
+void GPBSetMessageFloatField(GPBMessage *self, GPBFieldDescriptor *field, float value);
+
+double GPBGetMessageDoubleField(GPBMessage *self, GPBFieldDescriptor *field);
+void GPBSetMessageDoubleField(GPBMessage *self, GPBFieldDescriptor *field, double value);
+
+// Get/Set the given enum field of a message.  You can only Set values that are
+// members of the enum.  For proto3, when doing a Get, if the value isn't a
+// memeber of the enum, kGPBUnrecognizedEnumeratorValue will be returned. The
+// the functions with "Raw" in the will bypass all checks.
+int32_t GPBGetMessageEnumField(GPBMessage *self, GPBFieldDescriptor *field);
+void GPBSetMessageEnumField(GPBMessage *self, GPBFieldDescriptor *field, int32_t value);
+int32_t GPBGetMessageRawEnumField(GPBMessage *self, GPBFieldDescriptor *field);
+void GPBSetMessageRawEnumField(GPBMessage *self, GPBFieldDescriptor *field, int32_t value);
+
+// Repeated Fields
+
+// The object will/should be GPB*Array or NSMutableArray based on the field's
+// type.
+id GPBGetMessageRepeatedField(GPBMessage *self, GPBFieldDescriptor *field);
+void GPBSetMessageRepeatedField(GPBMessage *self, GPBFieldDescriptor *field, id array);
+
+// Map Fields
+
+// The object will/should be GPB*Dictionary or NSMutableDictionary based on the
+// field's type.
+id GPBGetMessageMapField(GPBMessage *self, GPBFieldDescriptor *field);
+void GPBSetMessageMapField(GPBMessage *self, GPBFieldDescriptor *field, id dictionary);
+
+//%PDDM-EXPAND-END GPB_ACCESSORS()
+
+// Returns an empty NSData to assign to byte fields when you wish
+// to assign them to empty. Prevents allocating a lot of little [NSData data]
+// objects.
+NSData *GPBEmptyNSData(void) __attribute__((pure));
+
+NS_ASSUME_NONNULL_END
+
+CF_EXTERN_C_END
+
+
+//%PDDM-DEFINE GPB_ACCESSORS()
+//%
+//%//
+//%// Get/Set the given field of a message.
+//%//
+//%
+//%// Single Fields
+//%
+//%GPB_ACCESSOR_SINGLE_FULL(Bytes, NSData, *)
+//%GPB_ACCESSOR_SINGLE_FULL(String, NSString, *)
+//%GPB_ACCESSOR_SINGLE_FULL(Message, GPBMessage, *)
+//%GPB_ACCESSOR_SINGLE_FULL(Group, GPBMessage, *)
+//%GPB_ACCESSOR_SINGLE(Bool, BOOL)
+//%GPB_ACCESSOR_SINGLE(Int32, int32_t)
+//%GPB_ACCESSOR_SINGLE(UInt32, uint32_t)
+//%GPB_ACCESSOR_SINGLE(Int64, int64_t)
+//%GPB_ACCESSOR_SINGLE(UInt64, uint64_t)
+//%GPB_ACCESSOR_SINGLE(Float, float)
+//%GPB_ACCESSOR_SINGLE(Double, double)
+//%// Get/Set the given enum field of a message.  You can only Set values that are
+//%// members of the enum.  For proto3, when doing a Get, if the value isn't a
+//%// memeber of the enum, kGPBUnrecognizedEnumeratorValue will be returned. The
+//%// the functions with "Raw" in the will bypass all checks.
+//%int32_t GPBGetMessageEnumField(GPBMessage *self, GPBFieldDescriptor *field);
+//%void GPBSetMessageEnumField(GPBMessage *self, GPBFieldDescriptor *field, int32_t value);
+//%int32_t GPBGetMessageRawEnumField(GPBMessage *self, GPBFieldDescriptor *field);
+//%void GPBSetMessageRawEnumField(GPBMessage *self, GPBFieldDescriptor *field, int32_t value);
+//%
+//%// Repeated Fields
+//%
+//%// The object will/should be GPB*Array or NSMutableArray based on the field's
+//%// type.
+//%id GPBGetMessageRepeatedField(GPBMessage *self, GPBFieldDescriptor *field);
+//%void GPBSetMessageRepeatedField(GPBMessage *self, GPBFieldDescriptor *field, id array);
+//%
+//%// Map Fields
+//%
+//%// The object will/should be GPB*Dictionary or NSMutableDictionary based on the
+//%// field's type.
+//%id GPBGetMessageMapField(GPBMessage *self, GPBFieldDescriptor *field);
+//%void GPBSetMessageMapField(GPBMessage *self, GPBFieldDescriptor *field, id dictionary);
+//%
+
+//%PDDM-DEFINE GPB_ACCESSOR_SINGLE(NAME, TYPE)
+//%GPB_ACCESSOR_SINGLE_FULL(NAME, TYPE, )
+//%PDDM-DEFINE GPB_ACCESSOR_SINGLE_FULL(NAME, TYPE, TisP)
+//%TYPE TisP##GPBGetMessage##NAME##Field(GPBMessage *self, GPBFieldDescriptor *field);
+//%void GPBSetMessage##NAME##Field(GPBMessage *self, GPBFieldDescriptor *field, TYPE TisP##value);
+//%