//protobuf-kotlin/com.google.protobuf.kotlin/contains
[JVM]
Content
operator fun <M : GeneratedMessageV3.ExtendableMessage<M>, MorBT : GeneratedMessageV3.ExtendableMessageOrBuilder<M>> MorBT.contains(extension: ExtensionLite<M, *>): Boolean
More info
Returns true if the specified extension is set on this builder.