diff --git a/src/session/mod.rs b/src/session/mod.rs
index 056fe20..ef41227 100644
--- a/src/session/mod.rs
+++ b/src/session/mod.rs
@@ -153,7 +153,6 @@ impl Session {
 	}
 
 	/// Returns this session's [`Allocator`].
-	#[must_use]
 	pub fn allocator(&self) -> &Allocator {
 		&self.inner.allocator
 	}
@@ -171,6 +170,21 @@ impl Session {
 	}
 
 	/// Returns a list of initializers which are overridable (i.e. also graph inputs).
+	///
+	/// ```
+	/// # use std::sync::Arc;
+	/// # use ort::{session::{RunOptions, Session}, value::{Value, ValueType, TensorRef, TensorElementType}};
+	/// # fn main() -> ort::Result<()> {
+	/// let session = Session::builder()?.commit_from_file("tests/data/overridable_initializer.onnx")?;
+	///
+	/// let mut overridable_initializers = session.overridable_initializers();
+	/// assert_eq!(overridable_initializers.len(), 1);
+	/// let f1 = overridable_initializers.pop().unwrap();
+	/// assert_eq!(f1.name(), "F1");
+	/// assert!(f1.dtype().is_tensor());
+	/// # 	Ok(())
+	/// # }
+	/// ```
 	#[must_use]
 	pub fn overridable_initializers(&self) -> Vec<OverridableInitializer> {
 		// can only fail if:
@@ -608,7 +622,7 @@ impl Session {
 		Ok(out)
 	}
 
-	/// Ends profiling for this session.
+	/// Ends profiling for this session. Returns the file name of the finalized profile.
 	///
 	/// Note that this must be explicitly called at the end of profiling, otherwise the profiling file will be empty.
 	pub fn end_profiling(&mut self) -> Result<String> {
@@ -648,14 +662,28 @@ impl Session {
 		Ok(())
 	}
 
+	/// Returns the version of the opset domain used by the model.
+	///
+	/// Requires the Model Editor API to be supported by the backend.
+	///
+	/// ```
+	/// # use std::sync::Arc;
+	/// # use ort::{session::{RunOptions, Session}, value::{Value, ValueType, TensorRef, TensorElementType}};
+	/// # fn main() -> ort::Result<()> {
+	/// let session = Session::builder()?.commit_from_file("tests/data/lora_model.onnx")?;
+	/// assert_eq!(session.opset_for_domain(ort::editor::ONNX_DOMAIN), Some(21));
+	/// # 	Ok(())
+	/// # }
+	/// ```
 	#[cfg(feature = "api-22")]
 	#[cfg_attr(docsrs, doc(cfg(feature = "api-22")))]
-	pub fn opset_for_domain(&self, domain: impl AsRef<str>) -> Result<u32> {
+	pub fn opset_for_domain(&self, domain: impl AsRef<str>) -> Option<u32> {
 		with_cstr(domain.as_ref().as_bytes(), &|domain| {
 			let mut opset = 0;
 			ortsys![@editor: unsafe SessionGetOpsetForDomain(self.inner.session_ptr.as_ptr(), domain.as_ptr(), &mut opset)?];
 			Ok(opset as u32)
 		})
+		.ok()
 	}
 }
 
diff --git a/tests/data/overridable_initializer.onnx b/tests/data/overridable_initializer.onnx
new file mode 100644
index 0000000..5c80850
Binary files /dev/null and b/tests/data/overridable_initializer.onnx differ