public Builder setFormatBytes(com.google.protobuf.ByteString value) {
                copyOnWrite();
                instance.setFormatBytes(value);
                return this;
            }
<code>optional string format = 4;</code>

@param value The bytes for format to set.
@return This builder for chaining.
turms-client-kotlin/src/main/java/im/turms/client/model/proto/model/file/VideoFile.java