code: private static void appendImmutableList(
        IndentedLinesBuilder ilb, String typeParamSnippet, Collection<String> itemSnippets) {
      appendListOrSetHelper(ilb, "ImmutableList." + typeParamSnippet + "of", itemSnippets);
    }
docs: Private helper to append an ImmutableList to the code.
  
  @param ilb The builder for the code.
  @param typeParamSnippet The type parameter for the ImmutableList.
  @param itemSnippets Code snippets for the items to put into the ImmutableList.