text: """ Represent a generic injection valve. """
  from abc import ABC
  from typing import Optional
  
  from flowchem.components.properties import ActiveComponent, MultiportComponentMixin
  
  
  class InjectionValve(MultiportComponentMixin, ActiveComponent, ABC):
      """
      A generic injection valve, i.e. a valve with positions 'inject' and 'load'.
      """
  
      def __init__(
          self,
          name: Optional[str] = None,
      ):
          # For injection valves, the positions are 'load' and 'inject'
          self.position = {"inject", "load"}
          self.setting = "load"
  
          # Call Valve init
          super().__init__(name=name)
  
          # Ensure base state is loading.
          self._base_state = {"setting": "load"}
  
          # TODO add injection loop volume
  