Function CMBlockBufferCreateEmpty 

pub unsafe extern "C-unwind" fn CMBlockBufferCreateEmpty(
    structure_allocator: Option<&CFAllocator>,
    sub_block_capacity: u32,
    flags: CMBlockBufferFlags,
    block_buffer_out: NonNull<*mut CMBlockBuffer>,
) -> i32

👎Deprecated: renamed to CMBlockBuffer::create_empty

Available on crate feature CMBlockBuffer only.