don't rewrite proxy handler if it has been overwritten (#2207)
don't rewrite proxy handler if it has been overwritten (#2207)


DevExpress/testcafe-hammerhead,LavrovArtem/testcafe-hammerhead,DevExpress/testcafe-hammerhead,DevExpress/testcafe-hammerhead,miherlosev/testcafe-hammerhead,miherlosev/testcafe-hammerhead,DevExpress/testcafe-hammerhead,LavrovArtem/testcafe-hammerhead,miherlosev/testcafe-hammerhead,miherlosev/testcafe-hammerhead,LavrovArtem/testcafe-hammerhead,LavrovArtem/testcafe-hammerhead