accents top-level property
Accent commands: coreAccents and unicode-math's.
Implementation
final Map<String, AccentInfo> accents = {
...coreAccents,
for (final MapEntry(key: name, value: (char, wide, below))
in unicodeMathAccents.entries)
if (!coreAccents.containsKey(name))
name: AccentInfo(char, stretchy: wide, under: below),
};