public void verifyCalls(int numChargeCalls, int numGetQuotaResourceCalls) {
      assertEquals("Invalid charge calls", numChargeCalls, this.numChargeCalls);
      assertEquals("Invalid getQuotaResource calls", numGetQuotaResourceCalls, this.numGetQuotaResourceCalls);
    }
Verify that the interface methods have been called expected number of times.
@param numChargeCalls expected number of charge calls.
@param numGetQuotaResourceCalls expected number of getQuotaResource calls.
ambry-router/src/test/java/com/github/ambry/router/QuotaAwareOperationControllerTest.java