Providers
=========

Providers are strategies of accessing objects. They describe how particular 
objects are provided.

Every provider is callable (implements ``__call__()``). Every call to provider 
instance returns provided result, according to the providing strategy of 
particular provider. 

Current documentation section consists from description of standard providers
library and some useful information like overriding of providers and writing 
custom providers.

All providers are validated in multithreading environment and considered to 
be thread-safe.

..  toctree::
    :maxdepth: 2

    factory
    singleton
    static
    callable
    external_dependency
    overriding
    custom