pub(crate) const unsafe fn from_off_unchecked(off: u64) -> Ptr<T, A> {
        Self {
            off,
            marker: PhantomData,
        }
    }
/// Creates new `Ptr` from file offset and len
///
/// # Safety
///
/// `off` should be valid
Creates new `Ptr` from file offset and len
Creates new ` Ptr ` from file offset and len
pub(crate) const unsafe fn from_off_unchecked(off: u64) -> Ptr<T, A> {
        Self {
            off,
            marker: PhantomData,
        }
    }
pub ( crate ) const unsafe fn from_off_unchecked ( off : u64 ) -> Ptr < T , A > { Self { off , marker : PhantomData , } }
Creates new `Ptr` from file offset and len
Creates new ` Ptr ` from file offset and len
off
u64
safety
`off` should be valid
` off ` should be valid