private com.google.protobuf.MapFieldBuilder<
              java.lang.String,
              com.google.cloud.visionai.v1.DataSchemaDetailsOrBuilder,
              com.google.cloud.visionai.v1.DataSchemaDetails,
              com.google.cloud.visionai.v1.DataSchemaDetails.Builder>
          internalGetFieldSchemas() {
        if (fieldSchemas_ == null) {
          return new com.google.protobuf.MapFieldBuilder<>(fieldSchemasConverter);
        }
        return fieldSchemas_;
      }
<pre>
The configuration for `CUSTOMIZED_STRUCT` data type.
</pre>

Protobuf type {@code google.cloud.visionai.v1.DataSchemaDetails.CustomizedStructConfig}
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/DataSchemaDetails.java