public Builder clearCreateTime() {
      bitField0_ = (bitField0_ & ~0x00000001);
      createTime_ = null;
      if (createTimeBuilder_ != null) {
        createTimeBuilder_.dispose();
        createTimeBuilder_ = null;
      }
      onChanged();
      return this;
    }
<pre>
Output only. Time that the operation was created.
</pre>

<code>
.google.protobuf.Timestamp create_time = 1 [(.google.api.field_behavior) = OUTPUT_ONLY];
</code>
java-workstations/proto-google-cloud-workstations-v1/src/main/java/com/google/cloud/workstations/v1/OperationMetadata.java