Interface for vehicle's lead/trail data.
  IsDataTypeSupported | Gets a value indicating whether the specified type can be used. | 
  SetLeadDataType | Set the display option for the leading portion of the vehicle's tracks. | 
  SetTrailDataType | Set the display option for the trailng portion of the vehicle's tracks. | 
  SetTrailSameAsLead | Set the trailing display option (and value, if applicable) to be the same as for the leading portion. | 
  HasLeadData | Determine whether the leading display option has value data. | 
  HasTrailData | Determine whether the trailing display option has value data. | 
  LeadData | Get the display value (time or percent) for the leading portion of the vehicle's tracks. | 
  LeadDataType | Get display option for the leading portion of the vehicle's tracks. | 
  SupportedDataTypes | Returns an array of valid choices. | 
  TrailData | Get the display value (time or percent) for the trailing portion of the vehicle's tracks. | 
  TrailDataType | Get display option for the trailing portion of the vehicle's tracks. | 





