code: public static void ensureInjected(){ //TODO: do real injection (lazy loading)
  		if(injected)
  			return;
  		Resources res = GWT.create(Resources.class);
  		String source = res.chartJsSource().getText();
          ScriptElement scriptElement = Document.get().createScriptElement();
          scriptElement.setId("_chartjs");
          scriptElement.setInnerText(source);
          Document.get().getBody().appendChild(scriptElement);
  		injected = true;
  	}
docs: Method injecting native chart.js code into the browser<br/>
  In case code already been injected do nothing