Get UI from IDEA

I need to implement "Template editor\chooser", but same Component already exist in IDEA. Can i import it (copypaste)?. Search by double shift return to much results so i'm confused. Where is src of components in screen: 

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com.intellij.ide.fileTemplates.impl.FileTemplateConfigurable
com.intellij.ide.fileTemplates.impl.AllFileTemplatesConfigurable
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