Function getModeForFileReference

test/fixtures/snapshot/typescript.js:116199–116201

* Calculates the resulting resolution mode for some reference in some file - this is generally the explicitly * provided resolution mode in the reference, unless one is not present, in which case it is the mode of the containing file.

(ref, containingFileMode)

     * provided resolution mode in the reference, unless one is not present, in which case it is the mode of the containing file.
     */
    function getModeForFileReference(ref, containingFileMode) {
        return (ts.isString(ref) ? containingFileMode : ref.resolutionMode) || containingFileMode;
    }
    ts.getModeForFileReference = getModeForFileReference;
    function getModeForResolutionAtIndex(file, index) {
        if (file.impliedNodeFormat === undefined)