code: def render(self, r):
      reader = {"name": "MatrixNativeReader", "path": self.path}
      if self.intervals is not None:
          assert self._interval_type is not None
          reader["options"] = {
              "name": "NativeReaderOptions",
              "intervals": self._interval_type._convert_to_json(
                  self.intervals
              ),
              "intervalPointType": self._interval_type.element_type.point_type._parsable_string(),
              "filterIntervals": self.filter_intervals,
          }
      return escape_str(json.dumps(reader))
  
imports: import abc
  import json
  from .utils import make_filter_and_replace, impute_type_of_partition_interval_array
  from ..expr.types import HailType, tfloat32, tfloat64
  from ..genetics.reference_genome import reference_genome_type
  from ..typecheck import typecheck_method, sequenceof, nullable, enumeration, anytype, oneof, dictof, sized_tupleof
  from ..utils import wrap_to_list
  from ..utils.misc import escape_str
label_desc: Use image node_id 2 for calling the MatrixNativeReader obj's underlying member method code with example usage: obj.render(r) and returns: escape_str