docs: public static CcgSyntaxTree createTerminal(SyntacticCategory syntax,
        SyntacticCategory originalSyntax, int spanStart, int spanEnd, List<String> words,
        List<String> posTags, HeadedSyntacticCategory headedSyntax) {
      Preconditions.checkNotNull(words);
      Preconditions.checkNotNull(posTags);
      return new CcgSyntaxTree(syntax, originalSyntax, spanStart, spanEnd, null, null, words,
          posTags, headedSyntax);
    }