What is "Extract from pattern"?

In the "Search with Pattern" dialog, what does the menu item "Add Placeholder | Extract from pattern" do?

When I click at it, nothing happens. The help file does not describe this menu item.

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Hello
     The 'Extract from pattern' item will extract all variables from your current search pattern if you haven't defined them yet. It does nothing when the search pattern contains no variables. Let me know if this helps. Thank you!

Andrey Serebryansky

Senior Support Engineer

JetBrains, Inc

http://www.jetbrains.com

"Develop with pleasure!"

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