private com.google.protobuf.MapField<
            java.lang.String, com.google.cloud.visionai.v1.DataSchemaDetails>
        internalGetFieldSchemas() {
      if (fieldSchemas_ == null) {
        return com.google.protobuf.MapField.emptyMapField(
            FieldSchemasDefaultEntryHolder.defaultEntry);
      }
      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