Function cpp_vm_address_region_range_op 

pub unsafe extern "C" fn cpp_vm_address_region_range_op(
    vmar: *mut VmAddressRegion,
    op: VmAddressRegion_RangeOpType,
    base: vaddr_t,
    len: usize,
    op_children: VmAddressRegionOpChildren,
    buffer: *mut c_void,
    buffer_size: usize,
) -> zx_status_t