code: public static SourceSnippet callMethod(final String methodName, final String fragmentPackageName,
        final Iterable<String> parameters) {
      return new SourceSnippet() {
        public String getSource(InjectorWriteContext writeContext) {
          return writeContext.callMethod(methodName, fragmentPackageName, parameters);
        }
      };
    }
docs: Creates a snippet that evaluates to an invocation of the named method on
  the given package fragment.
  
  <p>Used when generating an intermediate invoker method; see
  {@link MethodCallUtil#createMethodCallWithInjection}.