heading constant
String
const heading
Implementation
static const String heading =
'<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="20" height="20" preserveAspectRatio="xMidYMid meet" viewBox="0 0 20 20"><path fill="currentColor" d="M12.5 4v5.2h-5V4H5v13h2.5v-5.2h5V17H15V4z"/></svg>';