diff --git a/lib/deprecated/runtime-core/doc/new-api/instance.rs b/lib/deprecated/runtime-core/doc/new-api/instance.rs
index 770429a8d..4f1e25142 100644
--- a/lib/deprecated/runtime-core/doc/new-api/instance.rs
+++ b/lib/deprecated/runtime-core/doc/new-api/instance.rs
@@ -1,18 +1,14 @@
 struct Instance {
-    module: Arc<ModuleInner>,
     exports: Exports,
 }
 
 impl Instance {
-    fn load<T: Loader>(&self, loader: T) -> Result<T::Instnace, T::Error>;
-    fn fun<Args, Rets>(&self, name: &str) -> ResolveResult<Args, Rets, Wasm>;
-    fn resolve_func(&self, name: &str) -> ResolveError<usize>;
-    fn dyn_func(&self, name: &str) -> ResolveResult<DynFunc>;
-    fn call(&self, name: &str, params: &[Value]) -> CallResult<Vec<Value>>;
-    fn context(&self) -> &Ctx;
-    fn context_mut(&mut self) -> &mut Ctx;
-    fn exports(&self) -> ExportsIter;
+    fn load<T>(&self, _loader: T) -> Result<Self, ()>;
+    fn fun<Args, Rets>(&self, name: &str) -> Result<Func<Args, Rets>, ExportError>;
+    fn resolve_func(&self, name: &str) -> Result<usize, ()>;
+    fn dyn_fun(&self, name: &str) -> Result<DynFunc, ExportError>;
+    fn call(&self, name: &str, params: &[Value]) -> Result<Vec<Value>, Box<dyn Error>>;
+    fn context(&self) -> Ref<Ctx>;
+    fn context_mut(&mut self) -> RefMut<Ctx>;
     fn module(&self) -> Module;
-    fn get_internal(&self, fields: &InternalField) -> u64;
-    fn set_internal(&self, fields: &InternalField, value: u64);
 }
diff --git a/lib/deprecated/runtime-core/doc/new-api/module.rs b/lib/deprecated/runtime-core/doc/new-api/module.rs
index 2963786ec..e49c528cb 100644
--- a/lib/deprecated/runtime-core/doc/new-api/module.rs
+++ b/lib/deprecated/runtime-core/doc/new-api/module.rs
@@ -1,10 +1,10 @@
 struct Module {}
 
 impl Module {
-    fn instantiate(&self, import_object: &ImportObject) -> Result<Instance>;
-    fn cache(&self) -> Result<Artifact, CacheError>;
+    fn instantiate(&self, import_object: &ImportObject) -> Result<Instance, InstantiationError>;
+    fn cache(&self) -> Result<Artifact, Infallible>;
     fn info(&self) -> &ModuleInfo;
     fn imports(&self) -> Vec<ImportDescriptor>;
     fn exports(&self) -> Vec<ExportDescriptor>;
-    fn custom_sections(&self, key: impl AsRef<str>) -> Option<&[Vec<u8>]>
+    fn custom_sections(&self, name: impl Asref<str>) -> Option<Vec<Vec<u8>>>;
 }
diff --git a/lib/deprecated/runtime-core/doc/old-api/instance.rs b/lib/deprecated/runtime-core/doc/old-api/instance.rs
index 09c743e94..770429a8d 100644
--- a/lib/deprecated/runtime-core/doc/old-api/instance.rs
+++ b/lib/deprecated/runtime-core/doc/old-api/instance.rs
@@ -1,12 +1,18 @@
 struct Instance {
+    module: Arc<ModuleInner>,
     exports: Exports,
 }
 
 impl Instance {
-    fn load<T>(&self, _loader: T) -> Result<Self, ()>;
-    fn resolve_func(&self, name: &str) -> Result<usize, ()>;
-    fn call(&self, name: &str, params: &[Value]) -> Result<Vec<Value>, Box<dyn Error>>;
-    fn context(&self) -> Ref<Ctx>;
-    fn context_mut(&mut self) -> RefMut<Ctx>;
+    fn load<T: Loader>(&self, loader: T) -> Result<T::Instnace, T::Error>;
+    fn fun<Args, Rets>(&self, name: &str) -> ResolveResult<Args, Rets, Wasm>;
+    fn resolve_func(&self, name: &str) -> ResolveError<usize>;
+    fn dyn_func(&self, name: &str) -> ResolveResult<DynFunc>;
+    fn call(&self, name: &str, params: &[Value]) -> CallResult<Vec<Value>>;
+    fn context(&self) -> &Ctx;
+    fn context_mut(&mut self) -> &mut Ctx;
+    fn exports(&self) -> ExportsIter;
     fn module(&self) -> Module;
+    fn get_internal(&self, fields: &InternalField) -> u64;
+    fn set_internal(&self, fields: &InternalField, value: u64);
 }
diff --git a/lib/deprecated/runtime-core/doc/old-api/module.rs b/lib/deprecated/runtime-core/doc/old-api/module.rs
index e49c528cb..2963786ec 100644
--- a/lib/deprecated/runtime-core/doc/old-api/module.rs
+++ b/lib/deprecated/runtime-core/doc/old-api/module.rs
@@ -1,10 +1,10 @@
 struct Module {}
 
 impl Module {
-    fn instantiate(&self, import_object: &ImportObject) -> Result<Instance, InstantiationError>;
-    fn cache(&self) -> Result<Artifact, Infallible>;
+    fn instantiate(&self, import_object: &ImportObject) -> Result<Instance>;
+    fn cache(&self) -> Result<Artifact, CacheError>;
     fn info(&self) -> &ModuleInfo;
     fn imports(&self) -> Vec<ImportDescriptor>;
     fn exports(&self) -> Vec<ExportDescriptor>;
-    fn custom_sections(&self, name: impl Asref<str>) -> Option<Vec<Vec<u8>>>;
+    fn custom_sections(&self, key: impl AsRef<str>) -> Option<&[Vec<u8>]>
 }