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-rw-r--r--include/sway/tree/container.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/sway/tree/container.h b/include/sway/tree/container.h
index 5c368df2..2c973f71 100644
--- a/include/sway/tree/container.h
+++ b/include/sway/tree/container.h
@@ -285,6 +285,7 @@ bool container_is_fullscreen_or_child(struct sway_container *container);
/**
* Return the output which will be used for scale purposes.
* This is the most recently entered output.
+ * If the container is not on any output, return NULL.
*/
struct sway_output *container_get_effective_output(struct sway_container *con);