text: import logging
  logger = logging.getLogger('intake')
  
  # The registry is the mapping of plugin name (aka driver) to DataSource class
  registry = {}
  
  # A set of fully-qualifies package.module.Class mappings
  classes = {}
  
  
  def get_plugin_class(name):
      if name in registry:
          return registry[name]
      if '.' not in name:
          logger.debug('Plugin name "%s" not known' % name)
          return None
      if name not in classes:
          import importlib
          mod, cls = name.rsplit('.', 1)
          try:
              module = importlib.import_module(mod)
          except ImportError:
              logger.debug('Import of plugin module "%s" failed' % mod)
              return None
          try:
              classes[name] = getattr(module, cls)
          except (KeyError, NameError):
              logger.debug('Class "%s" not found in module "%s"' % (cls, mod))
      return classes.get(name, None)
  