setVersion(VERSION_EDEFAULT);
unsetVersion();
    public void eUnset(EStructuralFeature eFeature)    {        switch (eDerivedStructuralFeatureID(eFeature))        {            case ModelPackage.CHART__VERSION:                setVersion(VERSION_EDEFAULT);                return;            case ModelPackage.CHART__TYPE:                setType(TYPE_EDEFAULT);                return;            case ModelPackage.CHART__SUB_TYPE:                setSubType(SUB_TYPE_EDEFAULT);                return;            case ModelPackage.CHART__DESCRIPTION:                setDescription((Text) null);                return;            case ModelPackage.CHART__BLOCK:                setBlock((Block) null);                return;            case ModelPackage.CHART__DIMENSION:                unsetDimension();                return;            case ModelPackage.CHART__SCRIPT:                setScript(SCRIPT_EDEFAULT);                return;            case ModelPackage.CHART__UNITS:                setUnits(UNITS_EDEFAULT);                return;            case ModelPackage.CHART__SERIES_THICKNESS:                unsetSeriesThickness();                return;            case ModelPackage.CHART__SERIES_HINTS:                setSeriesHints((SeriesHint) null);                return;            case ModelPackage.CHART__GRID_COLUMN_COUNT:                unsetGridColumnCount();                return;            case ModelPackage.CHART__EXTENDED_PROPERTIES:                getExtendedProperties().clear();                return;            case ModelPackage.CHART__SAMPLE_DATA:                setSampleData((SampleData) null);                return;        }        eDynamicUnset(eFeature);    }