@java.lang.Override
    public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
      if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(entityClass_)) {
        com.google.protobuf.GeneratedMessageV3.writeString(output, 1, entityClass_);
      }
      if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(regex_)) {
        com.google.protobuf.GeneratedMessageV3.writeString(output, 2, regex_);
      }
      if (entityMatchingStrategy_
          != com.google.cloud.visionai.v1.TagParsingConfig.EntityParsingConfig
              .EntityMatchingStrategy.ENTITY_MATCHING_STRATEGY_UNSPECIFIED
              .getNumber()) {
        output.writeEnum(3, entityMatchingStrategy_);
      }
      getUnknownFields().writeTo(output);
    }
<pre>
Optional. Entity matching strategy.
</pre>

<code>
.google.cloud.visionai.v1.TagParsingConfig.EntityParsingConfig.EntityMatchingStrategy entity_matching_strategy = 3 [(.google.api.field_behavior) = OPTIONAL];
</code>

@return The entityMatchingStrategy.
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/TagParsingConfig.java