code: public static MethodInvoker getMethodInvokerForInterface(Class<?> cls,
  			String methodName, Object object, Class<?>... paramTypes) {
  
  		if (cls.isAssignableFrom(object.getClass())) {
  			return MethodInvokerUtils.getMethodInvokerByName(object, methodName, true,
  					paramTypes);
  		}
  		else {
  			return null;
  		}
  	}
docs: Create a {@link MethodInvoker} using the provided interface, and method name from
  that interface.
  @param cls the interface to search for the method named
  @param methodName of the method to be invoked
  @param object to be invoked
  @param paramTypes - parameter types of the method to search for.
  @return MethodInvoker if the method is found, null if it is not.