https://ffx.biochem.uiowa.edu/apidocs/ffx/potential/nonbonded/GeneralizedKirkwood.NonPolarModel.html
GeneralizedKirkwood.NonPolarModel (Force Field X 26.0.2 API)
declaration: package: ffx.potential.nonbonded, class: GeneralizedKirkwood, enum: NonPolarModel
force fieldxapi