method_impl.m:025: Warning: the type class `method_impl.c'/1 and the type
method_impl.m:025:   constructor in the argument vector of this instance
method_impl.m:025:   declaration for it, namely `method_impl.foo'/0, are all
method_impl.m:025:   visible outside this module, which means that this
method_impl.m:025:   instance can be relevant outside this module. Keeping it
method_impl.m:025:   private to this module is therefore likely to be a
method_impl.m:025:   mistake.
method_impl.m:026: In clause for instance method predicate `m1'/2:
method_impl.m:026:   in argument 2 of predicate `method_impl.foo_m1'/2:
method_impl.m:026:   type error: variable `HeadVar__2' has type
method_impl.m:026:     int;
method_impl.m:026:   expected type was
method_impl.m:026:     string.
method_impl.m:026:   The partial type assignment was:
method_impl.m:026:     HeadVar__1_1: method_impl.foo
method_impl.m:026:     HeadVar__2_2: int
method_impl.m:028: Warning: the type class `method_impl.c'/1 and the type
method_impl.m:028:   constructor in the argument vector of this instance
method_impl.m:028:   declaration for it, namely `method_impl.bar'/0, are all
method_impl.m:028:   visible outside this module, which means that this
method_impl.m:028:   instance can be relevant outside this module. Keeping it
method_impl.m:028:   private to this module is therefore likely to be a
method_impl.m:028:   mistake.
method_impl.m:029: In clause for instance method predicate `m1'/2:
method_impl.m:029:   error: call to undefined predicate `bar_m1'/2.