apply method
将当前配置合并到 baseStyle 并生成最终文字样式。
Implementation
TextStyle apply(TextStyle? baseStyle) {
return (baseStyle ?? const TextStyle()).copyWith(
color: color,
fontWeight: fontWeight,
fontSize: fontSize,
fontFamily: fontFamily,
decoration: decoration,
decorationStyle: decorationStyle,
decorationColor: decorationColor,
);
}