public static TestQuotaChargeCallback createTestQuotaChargeCallback(QuotaMethod quotaMethod) {
    return new TestQuotaChargeCallback(quotaMethod);
  }
Create an implementation of {@link QuotaChargeCallback} object for test.
@param quotaMethod {@link QuotaMethod} object.
@return TestQuotaChargeCallback object.
ambry-test-utils/src/main/java/com/github/ambry/quota/QuotaTestUtils.java