Extends the IAgAsDensityModelPlugin interface for use with numerical integration events.
  PostCompute | Triggered after the last evaluation of numerical integration before the plugin calls Free(). Use the input interface to access settings. | 
  PreCompute | Triggered just before numerical integration starts. Use the input interface to access settings. | 
  PreNextStep | Triggered just before the next propagation step is attempted during numerical integration. Use the input interface to access settings. Returning false will turn this callback off. | 





