Function is_from_raw_parts 

pub fn is_from_raw_parts(callee: Option<DefId>) -> bool

Whether callee is a from_raw_parts constructor (slice/str/ptr/ String/Vec/NonNull). Matched by DefId via crate::def_id::from_raw_parts_fns (resolved from fn_defs(), including local re-implementations), instead of substring-matching def_path_str.