Interface TextMetrics

interface TextMetrics {
    actualBoundingBoxAscent: number;
    actualBoundingBoxDescent: number;
    actualBoundingBoxLeft: number;
    actualBoundingBoxRight: number;
    alphabeticBaseline: number;
    emHeightAscent: number;
    emHeightDescent: number;
    fontBoundingBoxAscent: number;
    fontBoundingBoxDescent: number;
    width: number;
}