lib/utils/cypher.js
function labels (array) {
  var res = '';
  if(typeof array === 'string') {
    return ':' + array;
  }    
  for (var i = 0; i < array.length; i++) {
    res += ':' + array[i];
  }    
  return res;
}
function labels (array) {
  var res = '';
  if(typeof array === 'string') {
    return ':' + array;
  }    
  for (var i = 0; i < array.length; i++) {
    res += ':' + array[i];
  }    
  return res;
}
Example: labels(['User','Student']) returns ':User:Student'