/**
  *	UTILS
  **/
 public static function getValue($dimension, $time, $values)
 {
     //different logic whether time is single or interval
     $firstKey = isset($values) ? key($values) : "";
     if (strpos($firstKey, "-") === false && strpos($time, "-") === false) {
         $value = Chart::getSingleTimeValue($dimension, $time, $values);
     } else {
         $value = Chart::getIntervalTimeValue($dimension, $time, $values);
     }
     return $value;
 }