FE: Add test for KT-56227 (to confirm it's fixed)

compiler/testData/diagnostics/tests/inference/callableReferences/kt56227.kt

@@ -0,0 +1,30 @@
+// FIR_IDENTICAL
+// WITH_REFLECT
+import kotlin.reflect.KProperty0
+
+data class MyPattern(
+    val name: String,
+    val conservation: String?,
+    val awake: Double,
+    val brainwt: Double?,
+    val bodywt: Double,
+)
+
+
+internal inline fun <reified T> Iterable<T>.ggplot4(
+    x: T.() -> KProperty0<*>,
+    y: T.() -> KProperty0<*>,
+) {
+    // build df from data
+    val map = map { x(it) to y(it) }
+    map.first().first.name
+
+    TODO("do something meaningful")
+}
+
+fun main() {
+    listOf<MyPattern>().ggplot4(
+        x = { ::conservation },
+        y = { ::bodywt }
+    )
+}