| 92 | 
  | 
    DefineOptionalParameter(PrintPressureTensor, "printPressureTensor"); | 
| 93 | 
  | 
    DefineOptionalParameter(ElectricField, "electricField"); | 
| 94 | 
  | 
    DefineOptionalParameter(UniformField, "uniformField"); | 
| 95 | 
< | 
    DefineOptionalParameter(UniformGradient, "uniformGradient"); | 
| 95 | 
> | 
    DefineOptionalParameter(UniformGradientStrength, "uniformGradientStrength"); | 
| 96 | 
> | 
    DefineOptionalParameter(UniformGradientDirection1, "uniformGradientDirection1"); | 
| 97 | 
> | 
    DefineOptionalParameter(UniformGradientDirection2, "uniformGradientDirection2"); | 
| 98 | 
  | 
    //DefineOptionalParameter(PeriodicField, "periodicField"); | 
| 99 | 
  | 
    //DefineOptionalParameter(PeriodicFieldStrength, "periodicFieldStrength"); | 
| 100 | 
  | 
     |