code: @NonNull
      public static FullTextExpression index(@NonNull String name) {
          if (name == null) {
              throw new IllegalArgumentException("name is null.");
          }
          return new FullTextExpression(name);
      }
docs: Creates a full-text expression with the given full-text index name.
  
  @param name The full-text index name.
  @return The full-text expression.