@java.lang.Override
    public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
      if (((bitField0_ & 0x00000001) != 0)) {
        output.writeInt64(1, xMin_);
      }
      if (((bitField0_ & 0x00000002) != 0)) {
        output.writeInt64(2, yMin_);
      }
      if (((bitField0_ & 0x00000004) != 0)) {
        output.writeInt64(3, xMax_);
      }
      if (((bitField0_ & 0x00000008) != 0)) {
        output.writeInt64(4, yMax_);
      }
      getUnknownFields().writeTo(output);
    }
<pre>
The maximum y coordinate value.
</pre>

<code>optional int64 y_max = 4;</code>

@return The yMax.
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/Partition.java