The before_build DSL entity.
before_build
See d:Smokestack.factory.before_build for more information.
d:Smokestack.factory.before_build
@type attrs() :: %{required(String.t() | atom()) => any()}
@type t() :: %Smokestack.Dsl.BeforeBuild{ __identifier__: any(), hook: mfa() | (attrs() -> attrs()) }