scx_bypass
scx_bypass(parent, true);
scx_bypass(sch, true);
scx_bypass(sch, true);
scx_bypass(sch, false);
scx_bypass(sch, true);
scx_bypass(sch, false);
scx_bypass(sch, true);
scx_bypass(sch, false);
scx_bypass(sch, true);
scx_bypass(sch, false);