How to use the cordova/utils.defineGetter function in cordova

function clobber(obj, key, value) {
    exports.replaceHookForTesting(obj, key);
    obj[key] = value;
    // Getters can only be overridden by getters.
    if (obj[key] !== value) {
        utils.defineGetter(obj, key, function() {
            return value;
        });
    }
}

function clobber(obj, key, value) {
    exports.replaceHookForTesting(obj, key);
    obj[key] = value;
    // Getters can only be overridden by getters.
    if (obj[key] !== value) {
        utils.defineGetter(obj, key, function() {
            return value;
        });
    }
}

};

// States
FileReader.EMPTY = 0;
FileReader.LOADING = 1;
FileReader.DONE = 2;

utils.defineGetter(FileReader.prototype, 'readyState', function() {
    return this._localURL ? this._readyState : this._realReader.readyState;
});

utils.defineGetter(FileReader.prototype, 'error', function() {
    return this._localURL ? this._error: this._realReader.error;
});

utils.defineGetter(FileReader.prototype, 'result', function() {
    return this._localURL ? this._result: this._realReader.result;
});

function defineEvent(eventName) {
    utils.defineGetterSetter(FileReader.prototype, eventName, function() {
        return this._realReader[eventName] || null;
    }, function(value) {
        this._realReader[eventName] = value;
    });
}
defineEvent('onloadstart');    // When the read starts.
defineEvent('onprogress');     // While reading (and decoding) file or fileBlob data, and reporting partial file data (progress.loaded/progress.total)
defineEvent('onload');         // When the read has successfully completed.
defineEvent('onerror');        // When the read has failed (see errors).
defineEvent('onloadend');      // When the request has completed (either in success or failure).
defineEvent('onabort');        // When the read has been aborted. For instance, by invoking the abort() method.

* KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 *
*/

var exec = require('cordova/exec'),
    cordova = require('cordova'),
    channel = require('cordova/channel'),
    utils = require('cordova/utils');

// Link the onLine property with the Cordova-supplied network info.
// This works because we clobber the naviagtor object with our own
// object in bootstrap.js.
if (typeof navigator != 'undefined') {
    utils.defineGetter(navigator, 'onLine', function() {
        return this.connection.type != 'none';
    });
}

function NetworkConnection() {
    this.type = 'unknown';
}

/**
 * Get connection info
 *
 * @param {Function} successCallback The function to call when the Connection data is available
 * @param {Function} errorCallback The function to call when there is an error getting the Connection data. (OPTIONAL)
 */
NetworkConnection.prototype.getInfo = function(successCallback, errorCallback) {
    exec(successCallback, errorCallback, "NetworkStatus", "getConnectionInfo", []);

function clobber(obj, key, value) {
    exports.replaceHookForTesting(obj, key);
    obj[key] = value;
    // Getters can only be overridden by getters.
    if (obj[key] !== value) {
        utils.defineGetter(obj, key, function() {
            return value;
        });
    }
}

FileReader.READ_CHUNK_SIZE = 256 * 1024;

// States
FileReader.EMPTY = 0;
FileReader.LOADING = 1;
FileReader.DONE = 2;

utils.defineGetter(FileReader.prototype, 'readyState', function () {
    return this._localURL ? this._readyState : this._realReader.readyState;
});

utils.defineGetter(FileReader.prototype, 'error', function () {
    return this._localURL ? this._error : this._realReader.error;
});

utils.defineGetter(FileReader.prototype, 'result', function () {
    return this._localURL ? this._result : this._realReader.result;
});

function defineEvent (eventName) {
    utils.defineGetterSetter(FileReader.prototype, eventName, function () {
        return this._realReader[eventName] || null;
    }, function (value) {
        this._realReader[eventName] = value;
    });
}
defineEvent('onloadstart');    // When the read starts.
defineEvent('onprogress');     // While reading (and decoding) file or fileBlob data, and reporting partial file data (progress.loaded/progress.total)
defineEvent('onload');         // When the read has successfully completed.
defineEvent('onerror');        // When the read has failed (see errors).
defineEvent('onloadend');      // When the request has completed (either in success or failure).
defineEvent('onabort');        // When the read has been aborted. For instance, by invoking the abort() method.

function clobber (obj, key, value) {
    var needsProperty = false;
    try {
        obj[key] = value;
    } catch (e) {
        needsProperty = true;
    }
    // Getters can only be overridden by getters.
    if (needsProperty || obj[key] !== value) {
        utils.defineGetter(obj, key, function () {
            return value;
        });
    }
}

function assignOrWrapInDeprecateGetter(obj, key, value, message) {
    if (message) {
        utils.defineGetter(obj, key, function() {
            console.log(message);
            delete obj[key];
            clobber(obj, key, value);
            return value;
        });
    } else {
        clobber(obj, key, value);
    }
}

function assignOrWrapInDeprecateGetter(obj, key, value, message) {
    if (message) {
        utils.defineGetter(obj, key, function() {
            console.log(message);
            delete obj[key];
            clobber(obj, key, value);
            return value;
        });
    } else {
        clobber(obj, key, value);
    }
}

* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 *
*/

var origFileReader = window.FileReader,
    fileUtils = require('cordova/plugin/blackberry10/fileUtils'),
    utils = require('cordova/utils');

var FileReader = function() {
    this.nativeReader = new origFileReader();
};

utils.defineGetter(FileReader.prototype, 'readyState', function() {
    return this.nativeReader.readyState;
});

utils.defineGetter(FileReader.prototype, 'error', function() {
    return this.nativeReader.error;
});

utils.defineGetter(FileReader.prototype, 'result', function() {
    return this.nativeReader.result;
});

function defineEvent(eventName) {
    utils.defineGetterSetter(FileReader.prototype, eventName, function() {
        return this.nativeReader[eventName] || null;
    }, function(value) {
        this.nativeReader[eventName] = value;