cache: sync.Map{}, // [string]operationTimestamp {}
	}
}

// AddIfNotExist returns directly if there exists an entry with the key. Otherwise, it
// creates a new operation timestamp using operationName, pluginName, and current timestamp
// and stores the operation timestamp with the key
func (c *OperationStartTimeCache) AddIfNotExist(key, pluginName, operationName string) {
	ts := newOperationTimestamp(pluginName, operationName)