[core] Immutable Impls

1 files changed, 5 insertions, 1 deletions

diff --git a/src/mbgl/renderer/render_source.cpp b/src/mbgl/renderer/render_source.cpp
index 22043f9f3c..9eca54795a 100644
--- a/src/mbgl/renderer/render_source.cpp
+++ b/src/mbgl/renderer/render_source.cpp
@@ -6,7 +6,7 @@ namespace mbgl {
 
 static RenderSourceObserver nullObserver;
 
-RenderSource::RenderSource(const style::Source::Impl& impl)
+RenderSource::RenderSource(Immutable<style::Source::Impl> impl)
     : baseImpl(impl),
       observer(&nullObserver) {
 }
@@ -15,6 +15,10 @@ void RenderSource::setObserver(RenderSourceObserver* observer_) {
     observer = observer_;
 }
 
+void RenderSource::setImpl(Immutable<style::Source::Impl> impl) {
+    baseImpl = impl;
+}
+
 void RenderSource::onTileChanged(Tile& tile) {
     observer->onTileChanged(*this, tile.id);
 }