Function GxB_Matrix_subassign_INT32 

pub unsafe extern "C" fn GxB_Matrix_subassign_INT32(
    C: GrB_Matrix,
    Mask: GrB_Matrix,
    accum: GrB_BinaryOp,
    x: i32,
    I_: *const GrB_Index,
    ni: GrB_Index,
    J: *const GrB_Index,
    nj: GrB_Index,
    desc: GrB_Descriptor,
) -> GrB_Info