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It is actually possible to name these nodes component-type dash index. It would be better to avoid this as it is a little error prone, but in the edge case where you use the same transformer multiple times but with different configurations, you’d need to use this.
The reason this is a bad idea is that these transformers are hard to control – they always execute and they always execute before or after any transfomers defined in the pipeline configuration, based on a positive or negative service ranking.