QUESTION_QUESTION_EQ constant
TokenType
const QUESTION_QUESTION_EQ
Implementation
static const TokenType QUESTION_QUESTION_EQ = const TokenType('??=',
'QUESTION_QUESTION_EQ', ASSIGNMENT_PRECEDENCE, QUESTION_QUESTION_EQ_TOKEN,
binaryOperatorOfCompoundAssignment: TokenType.QUESTION_QUESTION,
isOperator: true);