Merging subsequent .filter()'s

idea/testData/intentions/loopToCallChain/filter_mergeMultiple.kt

@@ -0,0 +1,12 @@
+// WITH_RUNTIME
+fun foo(list: List<String>): String? {
+    <caret>for (s in list) {
+        if (s.isEmpty()) continue
+        if (s.length < 10 && s != "abc") {
+            if (s == "def") continue
+            val s1 = s + "x"
+            return s1
+        }
+    }
+    return null
+}

idea/testData/intentions/loopToCallChain/filter_mergeMultiple.kt.after

@@ -0,0 +1,7 @@
+// WITH_RUNTIME
+fun foo(list: List<String>): String? {
+    return list
+            .filter { !it.isEmpty() && it.length < 10 && it != "abc" && it != "def" }
+            .map { it + "x" }
+            .firstOrNull()
+}

idea/testData/intentions/loopToCallChain/firstOrNull_withMergedFilter.kt

@@ -0,0 +1,11 @@
+// WITH_RUNTIME
+fun foo(list: List<String>): String? {
+    <caret>for (s in list) {
+        if (s.isEmpty()) continue
+        if (s.length < 10 && s != "abc") {
+            if (s == "def") continue
+            return s
+        }
+    }
+    return null
+}

idea/testData/intentions/loopToCallChain/firstOrNull_withMergedFilter.kt.after

@@ -0,0 +1,4 @@
+// WITH_RUNTIME
+fun foo(list: List<String>): String? {
+    <caret>return list.firstOrNull { !it.isEmpty() && it.length < 10 && it != "abc" && it != "def" }
+}