Function assert_meta_flag_precedence 

pub fn assert_meta_flag_precedence(
    observed: OverridableMetaFlags,
    expected: OverridableMetaFlags,
)

Asserts the invalid and disabled flags observed after applying explicit per-flag props.

Registry tests should obtain observed from the actual attributes or state rendered by their widget, not by recomputing metadata resolution in the test.

Panics

Panics when either observed flag differs from the expected explicit-or-metadata result.