impl String {
    pub const fn into_bytes(self) -> Vec<u8>
    pub const fn as_str(&self) -> &str
    pub const fn capacity(&self) -> usize
    pub const fn as_bytes(&self) -> &[u8]
    pub const fn len(&self) -> usize
    pub const fn is_empty(&self) -> bool
}

impl Vec<T> {
    pub const fn capacity(&self) -> usize
    pub const fn as_slice(&self) -> &[T]
    pub const fn as_ptr(&self) -> *const T
    pub const fn len(&self) -> usize
    pub const fn is_empty(&self) -> bool
}