dict_use.erl:41: The attempt to match a term of type 
          dict:dict(_, _) against the pattern 
          'gazonk' breaks the opacity of the term
dict_use.erl:45: The attempt to match a term of type 
          dict:dict(_, _) against the pattern 
          [] breaks the opacity of the term
dict_use.erl:46: The attempt to match a term of type 
          dict:dict(_, _) against the pattern 
          42 breaks the opacity of the term
dict_use.erl:51: The attempt to match a term of type 
          dict:dict(_, _) against the pattern 
          [] breaks the opacity of the term
dict_use.erl:52: The attempt to match a term of type 
          dict:dict(_, _) against the pattern 
          42 breaks the opacity of the term
dict_use.erl:58: Attempt to test for equality between a term of type 
          maybe_improper_list() and a term of opaque type 
          dict:dict(_, _)
dict_use.erl:60: Attempt to test for inequality between a term of type 
          atom() and a term of opaque type 
          dict:dict(_, _)
dict_use.erl:64: Guard test length
         (D :: dict:dict(_, _)) breaks the opacity of its argument
dict_use.erl:65: Guard test is_atom
         (D :: dict:dict(_, _)) breaks the opacity of its argument
dict_use.erl:66: Guard test is_list
         (D :: dict:dict(_, _)) breaks the opacity of its argument
dict_use.erl:70: The type test is_list
         (dict:dict(_, _)) breaks the opacity of the term 
          dict:dict(_, _)
dict_use.erl:73: The call dict:fetch
         ('foo',
          [1, 2, 3]) does not have an opaque term of type 
          dict:dict(_, _) as 2nd argument
dict_use.erl:76: The call dict:merge
         (Fun :: any(),
          42,
          [1, 2]) does not have opaque terms as 2nd and 3rd arguments
dict_use.erl:79: The call dict:store
         (42,
          'elli',
          {'dict', 0, 16, 16, 8, 80, 48,
           {[], [], [], [], [], [], [], [], [], [], [], [], [], [], [],
            []},
           {{[], [], [], [], [], [], [], [], [], [], [], [], [], [], [],
             []}}}) does not have an opaque term of type 
          dict:dict(_, _) as 3rd argument