code: def __copy__(self):
      ret = SSAFunction()
      ret.inputs = self.inputs[:]
      ret.input_types = self.input_types[:]
      ret.outputs = self.outputs[:]
      ret.output_types = self.output_types[:]
      ret.graph = {k: copy.deepcopy(v) for k, v in self.graph.items()}
  
      return ret
  
imports: from __future__ import print_function
  from __future__ import division
  from __future__ import absolute_import
  import copy
  import logging
  from coremltools.converters.mil.mil import types
  from .basic_graph_ops import check_connections, const_determined_nodes
  from .dot_visitor import DotVisitor
  from .naming_utils import escape_fn_name
label_desc: Use image node_id 4 for calling the SSAFunction obj's underlying member method code with example usage: obj.__copy__() and returns: ret