Stop serializing project_node if it's None

src/snapshot/metadata.rs

@@ -45,6 +45,7 @@ pub struct InstanceMetadata {
     /// This information is used to make sure the instance has the correct name,
     /// project-added children, and metadata when it's updated in response to a
     /// file change.
+    #[serde(skip_serializing_if = "Option::is_none")]
     pub project_node: Option<(String, ProjectNode)>,
 }
 

src/snapshot/tests/snapshots/apply__add_property.snap

@@ -12,5 +12,4 @@ properties:
 metadata:
   ignore_unknown_instances: false
   contributing_paths: []
-  project_node: ~
 children: []

src/snapshot/tests/snapshots/apply__remove_property_initial.snap

@@ -12,5 +12,4 @@ properties:
 metadata:
   ignore_unknown_instances: false
   contributing_paths: []
-  project_node: ~
 children: []

src/snapshot/tests/snapshots/apply__set_name_and_class_name.snap

@@ -9,5 +9,4 @@ properties: {}
 metadata:
   ignore_unknown_instances: false
   contributing_paths: []
-  project_node: ~
 children: []

src/snapshot/tests/snapshots/compute__add_child.snap

@@ -10,7 +10,6 @@ added_instances:
       metadata:
         ignore_unknown_instances: false
         contributing_paths: []
-        project_node: ~
       name: New
       class_name: Folder
       properties: {}