private Map<String, List<PCell>> getParamMatrixMap(){

		if(this.paramMatrixMap == null){
			this.paramMatrixMap = getValue(GeneralRegressionModelEvaluator.paramMatrixCache);
		}

		return this.paramMatrixMap;
	}
private Map < String , List < PCell > > getParamMatrixMap ( ) { if ( this . paramMatrixMap == null ) { this . paramMatrixMap = getValue ( GeneralRegressionModelEvaluator . paramMatrixCache ) ; } return this . paramMatrixMap ; }
@return A map of parameter matrices.