Where is the path location "start a chat" of the source code in spark?

Sorry!

I want remove “start a chat” in menu action in spark

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**where is the path location “start a chat” **of the source code in spark?

This is probably Spark/ContactList.java at e82eab90c8cad2218ab8f3a80b9855ba632213f2 · igniterealtime/Spark · GitHub

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But this can also remove it from the context menu when right clicking a contact.