Generic reference handler create routine. This function creates a RefHandle for some given type, which is
an object with set and listen methods that you can use inside a context. JsPlumb uses this internally for the
Surface but we exposed it for usage in some of our demos.
Generic reference handler create routine. This function creates a
RefHandlefor some given type, which is an object withsetandlistenmethods that you can use inside a context. JsPlumb uses this internally for the Surface but we exposed it for usage in some of our demos.