code: public IndexTerminal forProperty(String property) {
  		IndexExpression ix = (IndexExpression) this.astNode;
  		ix.setPropertyName(property);
  		IndexTerminal ret = new IndexTerminal(ix);
  		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>select the property on which to create or drop the index</i></div>
  <div color='red' style="font-size:18px;color:red"><i>e.g. CREATE_INDEX.onLabel("Person").<b>forProperty("name")</b></i></div>
  <br/>