@Override
    public String toString() {
      return "Context[" +
        "parent=" + parent + ", " +
        "fieldOnParent=" + fieldOnParent + ", " +
        "type=" + type + ", " +
        "repeated=" + repeated + ']';
    }
Returns a new context that flattens-out this level of the hierarchy and writes values into the parent field.
planetiler-core/src/main/java/com/onthegomap/planetiler/reader/parquet/ParquetRecordConverter.java