Method has

basex-core/src/main/java/org/basex/query/func/StaticFunc.java:219–223

Indicates if an expression has one of the specified compiler properties. @param flags flags @return result of check @see Expr#has(Flag...)

(final Flag... flags)

   * @see Expr#has(Flag...)
   */
  boolean has(final Flag... flags) {
    // function itself does not perform any updates
    final Flag[] flgs = Flag.remove(flags, Flag.UPD);
    return flgs.length != 0 && check(flgs);
  }

  /**
   * Checks if the function body is updating.