code: public InCollection<T> fromAll(JcValue jcValue) {
  		CollectExpression cx = (CollectExpression)this.astNode;
  		cx.setIterationVariable(jcValue);
  		return new InCollection<T>(cx, this.connector);
  	}
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>define a variable (a JcValue or a subclass like JcNode) to iterate over a collection</i></div>
  <div color='red' style="font-size:18px;color:red"><i>e.g. ...<b>fromAll(n)</b>.IN_nodes(p)</i></div>
  <br/>