Trait Filter 

pub trait Filter: Fn(&RoomListItem) -> bool { }

A trait “alias” that represents a filter.

A filter is simply a function that receives a &Room and returns a bool.

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors

impl<F> Filter for F

where F: Fn(&RoomListItem) -> bool,