Variables
Const iconModifierExpression
iconModifierExpression: "~[A-Za-z]+" = '~[A-Za-z]+'
Const iconNameCharacter
iconNameCharacter: "[A-Za-z0-9~-]" = '[A-Za-z0-9~-]'
Const iconNameExpression
iconNameExpression: "[A-Za-z0-9-]+" = '[A-Za-z0-9-]+'
Const iconNameSegment
iconNameSegment: "[A-Za-z0-9]+" = '[A-Za-z0-9]+'