Keyword constructor
const
Keyword(})
Initialize a newly created keyword.
Implementation
const Keyword(int index, String lexeme, String name, this.keywordStyle,
{bool isModifier = false,
bool isTopLevelKeyword = false,
int precedence = NO_PRECEDENCE})
: super(index, lexeme, name, precedence, KEYWORD_TOKEN,
isModifier: isModifier, isTopLevelKeyword: isTopLevelKeyword);