# actix_web::actix::actix::dev - Rust
API documentation for the Rust `dev` mod in crate `actix_web`.
Keywords: rust, rustlang, rust-lang, dev

# Module actix_web::actix::actix::dev [−]

The `actix` prelude for library developers

The purpose of this module is to alleviate imports of many common actix traits by adding a glob import to the top of actix heavy modules:

    use actix::dev::*;

## Structs

ContextFut |
ContextParts |
Envelope |
Mailbox |
Registry | Actors registry
SystemRegistry | System wide actors registry

## Traits

AsyncContextParts |
MessageResponse | Trait which defines message response
ResponseChannel | Trait defines message response channel
ToEnvelope | Converter trait, packs message to suitable envelope

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