Function from_raw_parts_mut 

pub const unsafe fn from_raw_parts_mut<'a, T>(
    data: *mut T,
    len: usize,
) -> &'a mut UniqueEntityEquivalentSlice<T>
where
    T: EntityEquivalent,

Performs the same functionality as from_raw_parts, except that a mutable slice is returned.

Equivalent to slice::from_raw_parts_mut.

Safety

slice::from_raw_parts_mut must be safe to call with data and len. Additionally, all elements in the resulting slice must be unique.