code: public Concatenator BR_CLOSE() {
  		if (((PredicateExpression)this.astNode).getParent() != null) {
  			Concatenator ret = new Concatenator(((PredicateExpression)this.astNode).getParent());
  			return ret;
  		} else
  			throw new RuntimeException("No matching open bracket");
  	}
docs: <div color='red' style="font-size:24px;color:red"><b><i><u>JCYPHER</u></i></b></div>
  <div color='red' style="font-size:18px;color:red"><i>close a bracket; allows to nest expressions, must have a matching BR_OPEN()</i></div>
  <div color='red' style="font-size:18px;color:red"><i>e.g. WHERE... ...<b>BR_OPEN()</b>
  <br/>.valueOf(charlie.property("lastName")).EQUALS("Sheen")<br/>.<b>BR_CLOSE()</b></i></div>
  <br/>