Kotlin/Java: Add the beginnings of a "visibility" consistency query

java/ql/consistency-queries/visibility.ql

@@ -0,0 +1,22 @@
+import java
+
+string visibility(Method m) {
+  result = "public" and m.isPublic()
+  or
+  result = "protected" and m.isProtected()
+  or
+  result = "private" and m.isPrivate()
+  or
+  result = "internal" and m.isInternal()
+}
+
+// TODO: This ought to check more than just methods
+from Method m
+where
+  // TODO: This ought to work for everything, but for now we
+  //       restrict to things in Kotlin source files
+  m.getFile().isKotlinSourceFile() and
+  // TODO: This ought to have visibility information
+  not m.getName() = "<clinit>" and
+  count(visibility(m)) != 1
+select m, concat(visibility(m), ", ")