diff --git a/libimagdiary/src/is_in_diary.rs b/libimagdiary/src/is_in_diary.rs
index f02904ec..2b9d3fc7 100644
--- a/libimagdiary/src/is_in_diary.rs
+++ b/libimagdiary/src/is_in_diary.rs
@@ -18,8 +18,7 @@ impl IsInDiary for Entry {
 impl IsInDiary for StoreId {
 
     fn is_in_diary(&self, name: &str) -> bool {
-        use std::path::PathBuf;
-        self.is_in_collection(&PathBuf::from(format!("diary/{}", name)))
+        self.local().starts_with(format!("diary/{}", name))
     }
 
 }
diff --git a/libimagentrylink/src/external.rs b/libimagentrylink/src/external.rs
index ca095907..a6c2faef 100644
--- a/libimagentrylink/src/external.rs
+++ b/libimagentrylink/src/external.rs
@@ -91,10 +91,8 @@ pub trait ExternalLinker : InternalLinker {
 
 /// Check whether the StoreId starts with `/link/external/`
 pub fn is_external_link_storeid(id: &StoreId) -> bool {
-    use std::path::PathBuf;
-
     debug!("Checking whether this is a link/external/*: '{:?}'", id);
-    id.is_in_collection(&PathBuf::from("link/external"))
+    id.local().starts_with("link/external")
 }
 
 fn get_external_link_from_file(entry: &FileLockEntry) -> Result<Url> {
diff --git a/libimagstore/src/storeid.rs b/libimagstore/src/storeid.rs
index 8d9308d6..4bb26bf6 100644
--- a/libimagstore/src/storeid.rs
+++ b/libimagstore/src/storeid.rs
@@ -86,11 +86,9 @@ impl StoreId {
         self.id.components()
     }
 
-    /// Convenience function over PathBuf::starts_with().
-    ///
-    /// This function calls `PathBuf::starts_with()` on the _local_ part of `self`.
-    pub fn is_in_collection(&self, collspec: &PathBuf) -> bool {
-        self.id.starts_with(collspec)
+    /// Get the _local_ part of a StoreId object, as in "the part from the store root to the entry".
+    pub fn local(&self) -> &PathBuf {
+        &self.id
     }
 
 }
@@ -226,25 +224,4 @@ mod test {
         assert_eq!(p.into_storeid().unwrap().to_str().unwrap(), "test/test");
     }
 
-    #[test]
-    fn storeid_in_collection() {
-        use std::path::PathBuf;
-        let p = module_path::ModuleEntryPath::new("1/2/3/4/5/6/7/8/9/0").into_storeid().unwrap();
-
-        assert!(p.is_in_collection(&PathBuf::from("test/1")));
-        assert!(p.is_in_collection(&PathBuf::from("test/1/2")));
-        assert!(p.is_in_collection(&PathBuf::from("test/1/2/3")));
-        assert!(p.is_in_collection(&PathBuf::from("test/1/2/3/4")));
-        assert!(p.is_in_collection(&PathBuf::from("test/1/2/3/4/5")));
-        assert!(p.is_in_collection(&PathBuf::from("test/1/2/3/4/5/6")));
-        assert!(p.is_in_collection(&PathBuf::from("test/1/2/3/4/5/6/7")));
-        assert!(p.is_in_collection(&PathBuf::from("test/1/2/3/4/5/6/7/8")));
-        assert!(p.is_in_collection(&PathBuf::from("test/1/2/3/4/5/6/7/8/9")));
-        assert!(p.is_in_collection(&PathBuf::from("test/1/2/3/4/5/6/7/8/9/0")));
-
-        assert!(!p.is_in_collection(&PathBuf::from("test/0/2/3/4/5/6/7/8/9/0")));
-        assert!(!p.is_in_collection(&PathBuf::from("test/1/2/3/4/5/6/8")));
-        assert!(!p.is_in_collection(&PathBuf::from("test/1/2/3/leet/5/6/7")));
-    }
-
 }