code: public <T> T invoke(Object receiver, CreationalContext<T> creationalContext) {
          return invoke(receiver, creationalContext, null);
      }
docs: Invoke the method, causing all parameters to be injected according to the
  CDI type safe resolution rules.
  
  @param <T>               the return type of the method
  @param receiver          the instance upon which to call the method
  @param creationalContext the creational context to use to obtain
  injectable references for each parameter
  @return the result of invoking the method or null if the method's return
  type is void
  @throws RuntimeException            if this <code>Method</code> object enforces Java
  language access control and the underlying method is
  inaccessible or if the underlying method throws an exception or
  if the initialization provoked by this method fails.
  @throws IllegalArgumentException    if the method is an instance method and
  the specified <code>receiver</code> argument is not an instance
  of the class or interface declaring the underlying method (or
  of a subclass or implementor thereof); if an unwrapping
  conversion for primitive arguments fails; or if, after possible
  unwrapping, a parameter value cannot be converted to the
  corresponding formal parameter type by a method invocation
  conversion.
  @throws NullPointerException        if the specified <code>receiver</code> is
  null and the method is an instance method.
  @throws ExceptionInInitializerError if the initialization provoked by this
  method fails.