Ignore usages in XML

idea/idea-analysis/src/org/jetbrains/kotlin/idea/search/usagesSearch/destructuringDeclarationUsages.kt

@@ -18,6 +18,7 @@ package org.jetbrains.kotlin.idea.search.usagesSearch
 
 import com.intellij.ide.highlighter.JavaFileType
 import com.intellij.lang.java.JavaLanguage
+import com.intellij.lang.xml.XMLLanguage
 import com.intellij.openapi.application.ApplicationManager
 import com.intellij.psi.*
 import com.intellij.psi.search.*
@@ -306,6 +307,8 @@ private class Processor(
 
             JavaLanguage.INSTANCE -> processJavaDataClassUsage(element)
 
+            XMLLanguage.INSTANCE -> true // ignore usages in XML - they don't affect us
+
             else -> false // we don't know anything about usages in other languages - so we downgrade to slow algorithm in this case
         }
     }

idea/testData/findUsages/kotlin/conventions/components/dataClass.0.xml

@@ -0,0 +1,2 @@
+<tag xxx="pack.A"> <!--usage in xml-->
+</tag>