parameters: (state)
return_statement: return result
docstring: Return the set of states reachable from the given state
      by epsilon moves.
docstring_summary: Return the set of states reachable from the given state
      by epsilon moves.
docstring_tokens: Return the set of states reachable from the given state by epsilon moves .
function: def epsilon_closure(state):
      """
      Return the set of states reachable from the given state
      by epsilon moves.
      """
      # Cache the result
      result = state.epsilon_closure
      if result is None:
          result = {}
          state.epsilon_closure = result
          add_to_epsilon_closure(result, state)
      return result
function_tokens: def epsilon_closure ( state ) : # Cache the result result = state . epsilon_closure if result is None : result = { } state . epsilon_closure = result add_to_epsilon_closure ( result , state ) return result