code: def composed(self):
      # for compatibility, just return the topological ordering,
      # once we apply optimization on the subgraph,
      # `composed` is not needed any more and should be removed then.
      assert getattr(self._op, "fuse_graph", None) is not None
      fuse_graph = self._op.fuse_graph
      return list(fuse_graph.topological_iter())
  
file_path: mars/mars/core/entity/fuse.py
imports: import numpy
  from ...serialization.serializables import ReferenceField
  from .chunks import ChunkData, Chunk, CHUNK_TYPE
label_desc: Use image node_id 3 for calling the FuseChunkData obj's underlying member method code with example usage: obj.composed() and returns: list