Function ncreader_create 

pub unsafe extern "C" fn ncreader_create(
    n: *mut ncplane,
    opts: *const ncreader_options,
) -> *mut ncreader

ncreaders provide freeform input in a (possibly multiline) region, supporting optional readline keybindings. takes ownership of ‘n’, destroying it on any error (ncreader_destroy() otherwise destroys the ncplane).