1 files changed, 13 insertions, 0 deletions
diff --git a/platform/darwin/src/MGLStyleValue.mm b/platform/darwin/src/MGLStyleValue.mm
index 5103b5f5cf..01ad108d7f 100644
--- a/platform/darwin/src/MGLStyleValue.mm
+++ b/platform/darwin/src/MGLStyleValue.mm
@@ -44,3 +44,16 @@ id MGLJSONObjectFromMBGLValue(const mbgl::Value &value) {
 id MGLJSONObjectFromMBGLExpression(const mbgl::style::expression::Expression &mbglExpression) {
     return MGLJSONObjectFromMBGLValue(mbglExpression.serialize());
 }
+
+
+std::unique_ptr<mbgl::style::expression::Expression> MGLClusterPropertyFromNSExpression(NSExpression *expression) {
+    if (!expression) {
+        return nullptr;
+    }
+
+    NSArray *jsonExpression = expression.mgl_jsonExpressionObject;
+
+    auto expr = mbgl::style::expression::dsl::createExpression(mbgl::style::conversion::makeConvertible(jsonExpression));
+
+    return expr;
+}