$this->slotName
The name of the Slot that your Plugin is running from.
Can be used in methods called by plugins. From Zenario 7.0 onwards.
You may use this to design a Plugin that can be placed on a page multiple times, and behave differently for each Slot.
If your Plugin is placed in a Nest, then your $this->instanceId and $this->slotName variables will be the same as every other Plugin in the nest, but your $this->containerId and $this->eggId variables will be different.