If you are searching for an entity, there are a few ways to go about.
1. if this is in the UI there are a lot of things you can do from Entity Picker to first presenting a list of the potential entities using something like ThingTemplates["Name Of Template"].QueryImplementingThings
2. In a service you can use the SearchFunctions or similarly QueryImplementingThings
You should try to avoid using 'composer specific' functions to search.
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