envelope_fill constant Null safety
envelope_fill — Cupertino icon named "envelope_fill". Available on cupertino_icons package 1.0.0+ only. This is the same icon as mail_solid which is available in cupertino_icons 0.1.3.
Implementation
static const IconData envelope_fill = IconData(0xf423, fontFamily: iconFont, fontPackage: iconFontPackage);