pub unsafe extern "C" fn GxB_Matrix_select(
C: *mut GB_Matrix_opaque,
Mask: *mut GB_Matrix_opaque,
accum: *mut GB_BinaryOp_opaque,
op: *mut GB_SelectOp_opaque,
A: *mut GB_Matrix_opaque,
Thunk: *mut GB_Scalar_opaque,
desc: *mut GB_Descriptor_opaque
) -> i32