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// 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>
@class GPBUnknownField;
NS_ASSUME_NONNULL_BEGIN
/// A collection of unknown fields.
@interface GPBUnknownFieldSet : NSObject<NSCopying>
/// Tests to see if the given field number has a value.
///
/// @param number The field number to check.
///
/// @return YES if there is an unknown field for the given field number.
- (BOOL)hasField:(int32_t)number;
/// Fetches the @c GPBUnknownField for the given field number.
///
/// @param number The field number to look up.
///
/// @return The @c GPBUnknownField or nil.
- (nullable GPBUnknownField *)getField:(int32_t)number;
/// Returns the number of fields in this set.
- (NSUInteger)countOfFields;
/// Adds the given field to the set.
- (void)addField:(GPBUnknownField *)field;
/// Returns an NSArray of the @c GPBUnknownFields sorted by the field numbers.
- (NSArray<GPBUnknownField*> *)sortedFields;
@end
NS_ASSUME_NONNULL_END