code: def _setup():
          
          projex_path = os.getenv('PROJEX_PATH')
          if not projex_path:
              return
  
          base_path = os.path.dirname(__file__)
  
          logger.debug('Loading PROJEX_PATH: %s' % projex_path)
  
          # load the defaults from the install directory
          # load the paths from the environment
          paths = projex_path.split(os.path.pathsep)
          paths += [
              os.path.join(base_path, 'userplug'),
              os.path.join(base_path, 'stdplug'),
              os.path.join(base_path, 'lib'),
          ]
  
          sys.path = paths + sys.path
docs: Sets up the global import environment variables by registering the
          sub-folders for projex as import locations.  When defining your 
          custom manager, you will want to overload this method to do any
          sort of global initialization that you wish before continuing.
          
          :warning    This method is called by the _setup method, and should 
                      not be called directly.