Add(Remove)ParameterQuickFix is not available for unmodifiable files

idea/testData/quickfix/changeSignature/beforeAddParameterNotAvailableForBuiltins.kt

@@ -0,0 +1,6 @@
+// "Add parameter to function 'equals'" "false"
+// ERROR: Too many arguments for public fun jet.Any?.equals(other: jet.Any?): jet.Boolean defined in jet
+
+fun f(d: Any) {
+    d.equals("a", <caret>"b")
+}

idea/testData/quickfix/changeSignature/beforeAddParameterNotAvailableForLibrary.kt

@@ -0,0 +1,6 @@
+// "Add parameter to function 'equals'" "false"
+// ERROR: Too many arguments for public open fun equals(p0: jet.Any?): jet.Boolean defined in java.lang.Object
+
+fun f(d: java.lang.Object) {
+    d.equals("a", <caret>"b")
+}

idea/testData/quickfix/changeSignature/beforeRemoveParameterNotAvailableForBuiltins.kt

@@ -0,0 +1,6 @@
+// "Remove parameter 'other'" "false"
+// ERROR: No value passed for parameter other
+
+fun f(d: Boolean) {
+    d.or(<caret>)
+}