content: /*
   * Copyright 1999-2020 Alibaba Group Holding Ltd.
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
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        if (key == null) { throw new NullPointerException(); }
        if (value == null) { throw new NullPointerException(); }
        internalGetMutableHeaders().getMutableMap()
            .put(key, value);
        return this;
      }
      /**
       * <code>map&lt;string, string&gt; headers = 7;</code>
       */
  
      public Builder putAllHeaders(
          java.util.Map<String, String> values) {
        internalGetMutableHeaders().getMutableMap()
            .putAll(values);
        return this;
      }
      @Override
      public final Builder setUnknownFields(
          final com.google.protobuf.UnknownFieldSet unknownFields) {
        return super.setUnknownFields(unknownFields);
      }
  
      @Override
      public final Builder mergeUnknownFields(
          final com.google.protobuf.UnknownFieldSet unknownFields) {
        return super.mergeUnknownFields(unknownFields);
      }
  
  
      // @@protoc_insertion_point(builder_scope:Metadata)
    }
  
    // @@protoc_insertion_point(class_scope:Metadata)
    private static final Metadata DEFAULT_INSTANCE;
    static {
      DEFAULT_INSTANCE = new Metadata();
    }
  
    public static Metadata getDefaultInstance() {
      return DEFAULT_INSTANCE;
    }
  
    private static final com.google.protobuf.Parser<Metadata>
        PARSER = new com.google.protobuf.AbstractParser<Metadata>() {
      @Override
      public Metadata parsePartialFrom(
          com.google.protobuf.CodedInputStream input,
          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
          throws com.google.protobuf.InvalidProtocolBufferException {
        return new Metadata(input, extensionRegistry);
      }
    };
  
    public static com.google.protobuf.Parser<Metadata> parser() {
      return PARSER;
    }
  
    @Override
    public com.google.protobuf.Parser<Metadata> getParserForType() {
      return PARSER;
    }
  
    @Override
    public Metadata getDefaultInstanceForType() {
      return DEFAULT_INSTANCE;
    }
  
  }
  
  