code: def render(self):
      writer = {
          "name": "BlockMatrixNativeMultiWriter",
          "prefix": self.prefix,
          "overwrite": self.overwrite,
          "forceRowMajor": self.force_row_major,
          "stageLocally": self.stage_locally,
      }
      return escape_str(json.dumps(writer))
  
imports: import abc
  import json
  from ..typecheck import typecheck_method, sequenceof, nullable, enumeration
  from ..expr.types import tvoid, tstr
  from ..utils.misc import escape_str
label_desc: Use image node_id 2 for calling the BlockMatrixNativeMultiWriter obj's underlying member method code with example usage: obj.render() and returns: escape_str