
  [;1m-spec trace_pattern(MFA, MatchSpec) -> non_neg_integer()[0m
  [;1m                       when[0m
  [;1m                           MFA :: trace_pattern_mfa() | send | 'receive',[0m
  [;1m                           MatchSpec ::[0m
  [;1m                               (MatchSpecList :: trace_match_spec()) |[0m
  [;1m                               boolean() |[0m
  [;1m                               restart | pause.[0m

  Equivalent to [;;4merlang:trace_pattern(Event, MatchSpec, [])[0m,
  retained for backward compatibility.
