grey function Null safety
Implementation
String grey(String text,
{double level = 0.5, AnsiColor bgcolor = AnsiColor.none}) =>
AnsiColor._apply(AnsiColor.grey(level: level), text, bgcolor: bgcolor);
String grey(String text,
{double level = 0.5, AnsiColor bgcolor = AnsiColor.none}) =>
AnsiColor._apply(AnsiColor.grey(level: level), text, bgcolor: bgcolor);