@Override
  public boolean supportsNestedProjection() {
    if (mixedFormatDynamicSource instanceof SupportsProjectionPushDown) {
      return ((SupportsProjectionPushDown) mixedFormatDynamicSource).supportsNestedProjection();
    } else {
      return false;
    }
  }
@param tableName tableName
@param mixedFormatDynamicSource underlying source
@param mixedTable mixedTable
@param properties With all mixed-format table properties and sql options
@param tableLoader
amoro-format-mixed/amoro-mixed-flink/v1.15/amoro-mixed-flink-1.15/src/main/java/org/apache/amoro/flink/table/MixedFormatDynamicSource.java