Function CMBlockBufferAccessDataBytes 

pub unsafe extern "C-unwind" fn CMBlockBufferAccessDataBytes(
    the_buffer: &CMBlockBuffer,
    offset: usize,
    length: usize,
    temporary_block: NonNull<c_void>,
    returned_pointer_out: NonNull<*mut c_char>,
) -> i32

👎Deprecated: renamed to CMBlockBuffer::access_data_bytes

Available on crate feature CMBlockBuffer only.