@java.lang.Override
    public Builder clear() {
      super.clear();
      bitField0_ = 0;
      role_ = "";
      if (partsBuilder_ == null) {
        parts_ = java.util.Collections.emptyList();
      } else {
        parts_ = null;
        partsBuilder_.clear();
      }
      bitField0_ = (bitField0_ & ~0x00000002);
      return this;
    }
<pre>
The base structured datatype containing multi-part content of a message.

A `Content` includes a `role` field designating the producer of the `Content`
and a `parts` field containing multi-part data that contains the content of
the message turn.
</pre>

Protobuf type {@code google.cloud.vertexai.v1.Content}
java-vertexai/proto-google-cloud-vertexai-v1/src/main/java/com/google/cloud/vertexai/api/Content.java