p.location-badge.
  exported from <a href='../di'>angular2/di</a>
  defined in <a href="https://github.com/angular/angular/tree/2.0.0-alpha.33/modules/angular2/src/di/metadata.ts#L65-L83">angular2/src/di/metadata.ts (line 65)</a>

:markdown
  A marker metadata that marks a class as available to `Injector` for creation. Used by tooling
  for generating constructor stubs.
  
  ```
  class NeedsService {
    constructor(svc:UsefulService) {}
  }
  
  @Injectable
  class UsefulService {}
  ```
  
  

.l-main-section
  h2 Annotations
  .l-sub-section
    h3.annotation CONST
    pre.prettyprint
      code.
        @CONST()


.l-main-section
  h2 Members
  .l-sub-section
    h3 constructor

    
    pre.prettyprint
      code.
        constructor()
    
    :markdown