namespace mat {
    export function getDependency(params: ChartParams) : graphics.Dependency {
        switch (params.chartType) {
            case 0: {
                let imp: graphics.ImportantPoints = {/*...*/};
                let dep = (x: number) => {

                };

                (dep as graphics.Dependency).impoints = imp;
                return dep;
            }
            //По такому же принципу
        }
    }
}