disclosureClosed property
U+25B8 BLACK RIGHT-POINTING SMALL TRIANGLE (▸)
Implementation
static final disclosureClosed = CounterStyle.define(
name: 'disclosure-closed',
system: System.cyclic,
symbols: ['\u25B8'], //TODO for rtl use \u25C2 (◂)
/* ▸ */
suffix: ' ',
);