code: public static <T> void setInjectorInstance(Class<T> injectorClass, T injectorInstance) {
  		if (injectorInstance == null){
  			injectorsMap.remove(injectorClass);
  		}
  		injectorsMap.put(injectorClass, injectorInstance);
  	}
docs: Sets the injector instance to be used internally by the framework to inject views. If an injector instance is not declared here,
  a new instance is created every time a view is invoked.
  
  @param injectorClass The class literal of the injector.
  @param injectorInstance The injector instance to be used.
  
  @see View#injector()
  @since v.1.3.1