code: def add_function(self, f, tfssa):
      self.functions[f] = tfssa
  
imports: import copy
  from coremltools import _logger
  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 10 for calling the NetworkEnsemble obj's underlying member method code with example usage: obj.add_function(f, tfssa) without return types