pub unsafe extern "C" fn GxB_Matrix_export_BitmapC(
A: *mut *mut GB_Matrix_opaque,
type_: *mut *mut GB_Type_opaque,
nrows: *mut u64,
ncols: *mut u64,
Ab: *mut *mut i8,
Ax: *mut *mut c_void,
Ab_size: *mut u64,
Ax_size: *mut u64,
iso: *mut bool,
nvals: *mut u64,
desc: *mut GB_Descriptor_opaque
) -> i32