diff --git a/dsl/src/dsl_iter.rs b/dsl/src/dsl_iter.rs
index 0a94b3c..de9fe7a 100644
--- a/dsl/src/dsl_iter.rs
+++ b/dsl/src/dsl_iter.rs
@@ -14,10 +14,7 @@ use crate::*;
 /// Provides a native [Iterator] API over the [ConstIntoIter] [SourceIter]
 /// [TokenIter::next] returns just the [Token] and mutates `self`,
 /// instead of returning an updated version of the struct as [SourceIter::next] does.
-#[derive(Copy, Clone, Debug, Default, PartialEq)] pub struct TokenIter<'a>(
-    pub SourceIter<'a>
-);
-
+#[derive(Copy, Clone, Debug, Default, PartialEq)] pub struct TokenIter<'a>(pub SourceIter<'a>);
 impl<'a> TokenIter<'a> {
     pub const fn new (source: &'a str) -> Self {
         Self(SourceIter::new(source))
@@ -34,12 +31,6 @@ impl<'a> Iterator for TokenIter<'a> {
     }
 }
 
-impl<'a> From<SourceIter<'a>> for TokenIter<'a> {
-    fn from (source: SourceIter<'a>) -> Self{
-        Self(source)
-    }
-}
-
 /// Owns a reference to the source text.
 /// [SourceIter::next] emits subsequent pairs of:
 ///   * a [Token] and
diff --git a/input/src/input_dsl.rs b/input/src/input_dsl.rs
index 1fe3acf..3a79fd4 100644
--- a/input/src/input_dsl.rs
+++ b/input/src/input_dsl.rs
@@ -74,7 +74,7 @@ impl<'a, S, C: DslCommand<'a, S>, I: DslInput> KeyMap<'a, S, C, I> for TokenIter
 /// which may be made available subject to given conditions.
 pub struct InputMap<'a, S, C: DslCommand<'a, S>, I: DslInput, M: KeyMap<'a, S, C, I> + Send + Sync> {
     __: &'a PhantomData<(S, C, I)>,
-    pub layers: Vec<(
+    layers: Vec<(
         fn(&S)->bool,
         M
     )>,
@@ -152,3 +152,37 @@ where
         None
     }
 }
+
+    //fn handle <C> (&self, state: &mut T, input: &U) -> Perhaps<bool> {
+        //for layer in self.layers.iter() {
+            //if !(layer.0)(state) {
+                //continue
+            //}
+            //let command: Option<C> = SourceIter(layer.1).command::<_, _, _>(state, input);
+            //if let Some(command) = command {
+                //if let Some(undo) = command.execute(state)? {
+                    ////app.history.push(undo);
+                //}
+                //return Ok(Some(true))
+            //}
+        //}
+        //Ok(None)
+    //}
+//}
+    //fn layer (mut self, keymap: &'static str) -> Self {
+        //self.add_layer(keymap);
+        //self
+    //}
+    //fn layer_if (mut self, condition: impl Fn(&T)->bool + 'static, keymap: &'static str) -> Self {
+        //self.add_layer_if(condition, keymap);
+        //self
+    //}
+    //fn add_layer (&mut self, keymap: &'static str) -> &mut Self {
+        //self.layers.push((Box::new(|_|true), keymap));
+        //self
+    //}
+    //fn add_layer_if (&mut self, condition: impl Fn(&T)->bool + 'static, keymap: &'static str) -> &mut Self {
+        //self.layers.push((Box::new(condition), keymap));
+        //self
+    //}
+//}