const UNQUOTED_CHAR: (RangeInclusive<u8>, RangeInclusive<u8>, RangeInclusive<u8>, u8, u8);Expand description
unquoted-key = 1*( ALPHA / DIGIT / %x2D / %x5F ) ; A-Z / a-z / 0-9 / - / _
const UNQUOTED_CHAR: (RangeInclusive<u8>, RangeInclusive<u8>, RangeInclusive<u8>, u8, u8);unquoted-key = 1*( ALPHA / DIGIT / %x2D / %x5F ) ; A-Z / a-z / 0-9 / - / _