// merge policy function

    fluid.registerNamespace("decapod.modelReplacementComponent");

    decapod.modelReplacementComponent.extend = function (target, source) {
        target = target || {};
        if (fluid.isArrayable(target)) {
            target = typeof(source) !== "undefined" ? source : target;
        } else {
            for (var key in source) {
                if (typeof(target[key]) === "object" ) {
                    target[key] = decapod.modelReplacementComponent.extend(target[key], source[key]);
                } else {
                    if (typeof(source[key]) !== "undefined") {
                        target[key] = source[key];
                    }
                }
            }
        }

        return target;
    };

    decapod.modelReplacementComponent.mergeModel = function (target, source) {
        if (!fluid.isPrimitive(target)) {
            return decapod.modelReplacementComponent.extend(target, source);
        }
    };

    fluid.defaults("decapod.modelReplacementComponent", {
        gradeNames: ["fluid.viewComponent", "autoInit"],
        mergePolicy: {
            model: decapod.modelReplacementComponent.mergeModel
        }
    });


// Test code below
var newModel = {
                    a: "A",
                    b: ["C"]
            };
            fluid.defaults("decapod.test.overideModel", {
                gradeNames: ["decapod.modelReplacementComponent", "autoInit"],
                model: {
                    a: "a",
                    b: ["c", "d"]
                }
            });

            var that = decapod.test.overideModel(".dc-test", {
                model: fluid.copy(newModel)
            });

            jqUnit.assertDeepEq("The model should be overridden.", newModel, that.model);