error[E0495]: cannot infer an appropriate lifetime for lifetime parameter in function call due to conflicting requirements
  --> src/main.rs:39:37
   |
39 |         for item in self.collection.iter() {
   |                                     ^^^^
   |
note: first, the lifetime cannot outlive the anonymous lifetime #1 defined on the body at 36:90...
  --> src/main.rs:36:91
   |
36 |     fn dispatch(&self, input: &'static str) -> Box<Stream<Item = Success, Error = Error>> {
   |                                                                                           ^
note: ...so that reference does not outlive borrowed content
  --> src/main.rs:39:21
   |
39 |         for item in self.collection.iter() {
   |                     ^^^^^^^^^^^^^^^
   = note: but, the lifetime must be valid for the static lifetime...
note: ...so that the declared lifetime parameter bounds are satisfied
  --> src/main.rs:49:9
   |
49 |           Box::new(rx.then(|result| {
   |  _________^ starting here...
50 | |             result.expect("receivers cannot produce errors")
51 | |         })) as Box<Stream<Item = Success, Error = Error>>
   | |_________________________________________________________^ ...ending here