public aspect DeclareParentsBinaryAspect {
    declare parents: DP1 extends DPB;
    declare parents: DP2 extends DPB;
    declare parents: DP3 extends DPB;
    declare parents: DP4 extends DPB;
    declare parents: DP5 extends DPA;
    declare parents: DP6 extends DPF;
    declare parents: DP7 implements DPI;
    declare parents: DP8 implements DPI;
    declare parents: DP9 implements DPI;
}