function LensExampleUtils(lensExamplesDict) {
    this._lensExamplesDict = lensExamplesDict;

    this.getExamplesForLens = function getExamplesForLens(lensId) {
        // return an array of examples for the lens whose id is given

        log('getExamplesForLens: enter');

        var examples = this._lensExamplesDict[lensId];

        if (typeof examples === "undefined") {
            examples = [];
        }

        log('getExamplesForLens: leave');

        return examples;
    };
};