An error related to VmComparator

[ThanaaS]

In class DatacenterBrokerModifiedRealTime.java
I found error in lines 147 and 148 which points to peek() and remove()! even VmComparator.java included in same backag:
if(presentTime - startTime > checkList.peek().estimatedTime) {
VmComparator vm = checkList.remove();