code: public static Concat BR_OPEN() {
  		Concat ret = P.BR_OPEN();
  		ASTNode an = APIObjectAccess.getAstNode(ret);
  		an.setClauseType(ClauseType.WHERE);
  		return ret;
  	}
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>open a bracket; allows to nest expressions, must have a matching BR_CLOSE()</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/>