stub out some of the edn command readers

midi/src/midi_pool.rs

@@ -36,6 +36,11 @@ pub enum MidiPoolCommand {
     SetLength(usize, usize),
     SetColor(usize, ItemColor),
 }
+impl MidiPoolCommand {
+    pub fn from_edn <'a> (head: &EdnItem<&str>, tail: &'a [EdnItem<String>]) -> Self {
+        todo!()
+    }
+}
 
 impl<T: HasClips> Command<T> for MidiPoolCommand {
     fn execute (self, model: &mut T) -> Perhaps<Self> {
@@ -191,6 +196,11 @@ pub enum PoolCommand {
     /// Export to file
     Export(FileBrowserCommand),
 }
+impl PoolCommand {
+    pub fn from_edn <'a> (head: &EdnItem<&str>, tail: &'a [EdnItem<String>]) -> Self {
+        todo!()
+    }
+}
 
 command!(|self:PoolCommand, state: PoolModel|{
     use PoolCommand::*;