code: public DoConcat SET(JcLabel label) {
  		ModifyTerminal mt = ModifyFactory.setLabel(label);
  		ASTNode clause = APIObjectAccess.getAstNode(mt);
  		clause.setClauseType(ClauseType.SET);
  		return createConcat(clause);
  	}
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>set a label of a node in the DO part of a FOREACH expression</i></div>
  <div color='red' style="font-size:18px;color:red"><i>e.g. ...<b>SET(n.label("Person"))</b></i></div>
  <br/>