translate(token, extra) {

        const type = token.type,
            tt = this._acornTokTypes;

        if (type === tt.name) {
            token.type = Token.Identifier;

            // TODO: See if this is an Acorn bug
            if (token.value === "static") {
                token.type = Token.Keyword;
            }

            if (extra.ecmaVersion > 5 && (token.value === "yield" || token.value === "let")) {
                token.type = Token.Keyword;
            }

        } else if (type === tt.privateId) {
            token.type = Token.PrivateIdentifier;

        } else if (type === tt.semi || type === tt.comma ||
                 type === tt.parenL || type === tt.parenR ||
                 type === tt.braceL || type === tt.braceR ||
                 type === tt.dot || type === tt.bracketL ||
                 type === tt.colon || type === tt.question ||
                 type === tt.bracketR || type === tt.ellipsis ||
                 type === tt.arrow || type === tt.jsxTagStart ||
                 type === tt.incDec || type === tt.starstar ||
                 type === tt.jsxTagEnd || type === tt.prefix ||
                 type === tt.questionDot ||
                 (type.binop && !type.keyword) ||
                 type.isAssign) {

            token.type = Token.Punctuator;
            token.value = this._code.slice(token.start, token.end);
        } else if (type === tt.jsxName) {
            token.type = Token.JSXIdentifier;
        } else if (type.label === "jsxText" || type === tt.jsxAttrValueToken) {
            token.type = Token.JSXText;
        } else if (type.keyword) {
            if (type.keyword === "true" || type.keyword === "false") {
                token.type = Token.Boolean;
            } else if (type.keyword === "null") {
                token.type = Token.Null;
            } else {
                token.type = Token.Keyword;
            }
        } else if (type === tt.num) {
            token.type = Token.Numeric;
            token.value = this._code.slice(token.start, token.end);
        } else if (type === tt.string) {

            if (extra.jsxAttrValueToken) {
                extra.jsxAttrValueToken = false;
                token.type = Token.JSXText;
            } else {
                token.type = Token.String;
            }

            token.value = this._code.slice(token.start, token.end);
        } else if (type === tt.regexp) {
            token.type = Token.RegularExpression;
            const value = token.value;

            token.regex = {
                flags: value.flags,
                pattern: value.pattern
            };
            token.value = `/${value.pattern}/${value.flags}`;
        }

        return token;
    }
Translates a single Esprima token to a single Acorn token. This may be
inaccurate due to how templates are handled differently in Esprima and
Acorn, but should be accurate for all other tokens.
@param {AcornToken} token The Acorn token to translate.
@param {Object} extra Espree extra object.
@returns {EsprimaToken} The Esprima version of the token.