How to get the Element Locators on Canvas using TestBench

I had developed an application using Vaadin 7 framework also using Open Layers, now i need to test the Elements On the canvas , when i tried using Vaadin Testbench , i am getting same Element Locator value for all the clicks on the Canvas ,

 org.vaadin.addon.vol3.OLMapElement orgvaadinaddonvol3OLMap1 = $(org.vaadin.addon.vol3.OLMapElement.class).first();

in the above element Locator I am getting an error at org.vaadin.addon.vol3.OLMapElement and also the class is missing ,i searched in maven repository also