Function findImmediatelyPrecedingTokenOfKind

test/fixtures/snapshot/typescript.js:147057–147062

* Validating `expectedTokenKind` ensures the token was typed in the context we expect (eg: not a comment). * @param expectedTokenKind The kind of the last token constituting the desired parent node.

(end, expectedTokenKind, sourceFile)

         * @param expectedTokenKind The kind of the last token constituting the desired parent node.
         */
        function findImmediatelyPrecedingTokenOfKind(end, expectedTokenKind, sourceFile) {
            var precedingToken = ts.findPrecedingToken(end, sourceFile);
            return precedingToken && precedingToken.kind === expectedTokenKind && end === precedingToken.getEnd() ?
                precedingToken :
                undefined;
        }
        /**
         * Finds the highest node enclosing `node` at the same list level as `node`
         * and whose end does not exceed `node.end`.