Add missing inline

toml-span/src/de_helpers.rs

@@ -136,6 +136,7 @@ impl<'de> TableHelper<'de> {
     /// Note that if the key exists but deserialization fails, an error will be
     /// appended and if [`Self::finalize`] is called it will return that error
     /// along with any others that occurred
+    #[inline]
     pub fn optional<T: Deserialize<'de>>(&mut self, name: &'static str) -> Option<T> {
         self.optional_s(name).map(|v| v.value)
     }