Add JetMultiDeclarationReference

A reference to component* functions

idea/testData/resolve/referenceWithLib/multiDeclarationWithTypeParameters.kt

@@ -0,0 +1,13 @@
+package test
+
+import dependency.*
+
+fun <Int> f(l: List<Int>) {
+    val (e<caret>l1, el2, el3) = l
+}
+
+// MULTIRESOLVE
+// REF: (for kotlin.List<T> in dependency).component1()
+// REF: (for kotlin.List<T> in dependency).component2()
+// REF: (for kotlin.List<T> in dependency).component3()
+

idea/testData/resolve/referenceWithLib/multiDeclarationWithTypeParametersSrc/multiDeclarationWithTypeParametersDependency.kt

@@ -0,0 +1,5 @@
+package dependency
+
+fun <T> List<T>.component1() = get(0)
+fun <T> List<T>.component2() = get(1)
+fun <T> List<T>.component3() = get(2)

idea/testData/resolve/references/MultiDeclarationReference.kt

@@ -0,0 +1,15 @@
+package a
+
+class A() {
+}
+
+fun A.component1() = 1
+fun A.component2() = 1
+
+fun main(args: Array<String>) {
+    val (a,<caret> b) = A()
+}
+
+// MULTIRESOLVE
+// REF: (for A in a).component1()
+// REF: (for A in a).component2()

idea/testData/resolve/references/PairMultiDeclaration.kt

@@ -0,0 +1,10 @@
+package a
+
+fun main(args: Array<String>) {
+    val p = Pair(1, 2)
+    val (a, b<caret>) = p
+}
+
+// MULTIRESOLVE
+// REF: (in kotlin.Pair).component1()
+// REF: (in kotlin.Pair).component2()