public interface MyInterface{
    public firstMethod(String pid, String mid, ClassDefinedByMe classDefinedByMe);
    public secondMethod(String pid, String mid, AnotherClassDefinedByMe anotherClassDefinedByMe);
    public thirdMethod(String pid, String mid);
}

firstMethod([String pid1, String mid1, ClassDefinedByMe classDefinedByMe1],[String pid2, String mid2, ClassDefinedByMe classDefinedByMe2], [String pid3, String mid3, ClassDefinedByMe classDefinedByMe3]);

public secondMethod([String pid1, String mid1, AnotherClassDefinedByMe anotherClassDefinedByMe1],[String pid2, String mid2, AnotherClassDefinedByMe anotherClassDefinedByMe2], [String pid3, String mid3, AnotherClassDefinedByMe anotherClassDefinedByMe3], [String pid4, String mid4, AnotherClassDefinedByMe anotherClassDefinedByMe4] );
  public thirdMethod([String pid1, String mid1],[String pid2, String mid2],[String pid3, String mid3]);