Debugger: Run control flow on code fragments (KT-30120)

idea/testData/checker/codeFragments/unusedEquals.kt

@@ -0,0 +1,16 @@
+// INSPECTION_CLASS: org.jetbrains.kotlin.idea.inspections.UnusedEqualsInspection
+
+fun main() {
+    val list = java.util.ArrayList<Int>()
+    <caret>val x = 0
+}
+
+fun <T> Collection<T>.isAny(predicate: (T) -> Boolean): Boolean {
+    for (item in this) {
+        if (predicate(item)) {
+            return true
+        }
+    }
+
+    return false
+}

idea/testData/checker/codeFragments/unusedEquals.kt.fragment

@@ -0,0 +1 @@
+list.isAny { it == 2 }