By default Moo turns all warnings to fatal warnings. Moo::Lax is exactly the same as Moo, except that it doesn't turn all warnings to fatal warnings in the calling module.

By default Moo::Role turns all warnings to fatal warnings. This module is exactly the same as Moo::Role, except that it doesn't turn all warnings to fatal warnings in the calling module.

By default oo turns all warnings to fatal warnings. oo::Lax is exactly the same as oo, except that it doesn't turn all warnings to fatal warnings in the calling module.