geopackage-sdk/src/main/java/mil/nga/geopackage/extension/style/IconRow.java
public void setWidth(Double width) {
        if (width != null && width < 0.0) {
            throw new GeoPackageException(
                    "Width must be greater than or equal to 0.0, invalid value: "
                            + width);
        }
        setValue(getWidthColumnIndex(), width);
    }
public void setWidth(Double width) {
        if (width != null && width < 0.0) {
            throw new GeoPackageException(
                    "Width must be greater than or equal to 0.0, invalid value: "
                            + width);
        }
        setValue(getWidthColumnIndex(), width);
    }
Set the width

@param width Icon display width, when null use actual icon width