public Builder clearCreateTime() {
      bitField0_ = (bitField0_ & ~0x00000004);
      createTime_ = null;
      if (createTimeBuilder_ != null) {
        createTimeBuilder_.dispose();
        createTimeBuilder_ = null;
      }
      onChanged();
      return this;
    }
<pre>
Required. The timestamp of the event.
</pre>

<code>.google.protobuf.Timestamp create_time = 4 [(.google.api.field_behavior) = REQUIRED];
</code>
java-talent/proto-google-cloud-talent-v4beta1/src/main/java/com/google/cloud/talent/v4beta1/ClientEvent.java