protected RubyString escape(VirtualFrame frame, RubyString string) {
if (escapeNode == null) {
CompilerDirectives.transferToInterpreterAndInvalidate();
escapeNode =
insert(
RegexpNodesFactory.EscapeNodeFactory.create(
getContext(), getSourceSection(), new RubyNode[] {null}));
}
return escapeNode.executeEscape(frame, string);
}