Refactor series writer

batchtools/src/jobchn.rs

@@ -0,0 +1,9 @@
+use std::marker::PhantomData;
+
+pub struct JobChnWorker<JOB> {
+    _t1: PhantomData<JOB>,
+}
+
+impl<JOB> JobChnWorker<JOB> {}
+
+//pub fn submit_and_await(job)

batchtools/src/lib.rs

@@ -1,3 +1,4 @@
 pub mod batcher;
 #[cfg(test)]
 pub mod channeltest;
+pub mod jobchn;