public Builder mergeEnd(com.google.type.DateTime value) {
      if (endBuilder_ == null) {
        if (((bitField0_ & 0x00000002) != 0)
            && end_ != null
            && end_ != com.google.type.DateTime.getDefaultInstance()) {
          getEndBuilder().mergeFrom(value);
        } else {
          end_ = value;
        }
      } else {
        endBuilder_.mergeFrom(value);
      }
      if (end_ != null) {
        bitField0_ |= 0x00000002;
        onChanged();
      }
      return this;
    }
<pre>
End data time.
</pre>

<code>.google.type.DateTime end = 2;</code>
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/DateTimeRange.java