anchor.diff:  %% @doc Returns the list of success variable subtrees of an abstract
   %% try-expression.
   %%
  -%% @see c_try/3
  +%% @see c_try/5
   
   -spec try_vars(c_try()) -> [cerl()].
   
  
positive.code: %% @doc Returns the exception body subtree of an abstract
  %% try-expression.
  %%
  %% @see c_try/3
  
  -spec try_handler(c_try()) -> cerl().
  
  
negative.code: %% efficient.</p>
  %%
  %% @see c_cons/2
  %% @see c_nil/0
  %% @see is_c_list/1
  %% @see list_elements/1
  
  