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/**
 * @private
 */
namespace egret.sys {

    /**
     * 测量文本在指定样式下的宽度。
     * @param text 要测量的文本内容。
     * @param fontFamily 字体名称
     * @param fontSize 字体大小
     * @param bold 是否粗体
     * @param italic 是否斜体
     */
    export let measureText:(text:string, fontFamily:string, fontSize:number, bold:boolean, italic:boolean)=>number;
}