Function heif_raw_sequence_sample_get_data_size 

pub unsafe extern "C" fn heif_raw_sequence_sample_get_data_size(
    arg1: *const heif_raw_sequence_sample,
) -> usize

Return the size of the raw data contained in the sample. This is the same as returned through the ‘out_array_size’ parameter of ‘heif_raw_sequence_sample_get_data()’.