code: def render(self):
      writer = {"name": "BlockMatrixBinaryWriter", "path": self.path}
      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 BlockMatrixBinaryWriter obj's underlying member method code with example usage: obj.render() and returns: escape_str