• slice_from_prefix returns Option<(&[Self], &[u8])>
• slice_from_suffix returns Option<(&[u8], &[Self])>
• mut_slice_from_prefix returns Option<(&mut [Self], &mut [u8])>
• mut_slice_from_suffix returns Option<(&mut [u8], &mut [Self])>

However, all of the other methods drop the prefix/suffix:

• FromBytes::read_from_prefix returns Option<Self>
• FromBytes::read_from_suffix returns Option<Self>
• FromBytes::ref_from_prefix returns Option<&Self>
• FromBytes::ref_from_suffix returns Option<&Self>
• FromBytes::mut_from_prefix returns Option<&mut Self>
• FromBytes::mut_from_suffix returns Option<&mut Self>

This is desirable: the majority of the time I drop the prefix anyways and these are convenience methods for methods in Ref.
[ref|mut]_from_[prefix|suffix] in their docs both point to using Ref to preserve the prefix/suffix.