nstance that was bound.");
        }

        // Garbage collect Javascript references.  Remaining references should be internal to WebGL.
        instances = null;
        webglHarnessCollectGarbage();

        for (var i = 0; i <= test.indexMax; i++) {
            var msg = "getIndexedParameter(" + test.name + ", " + i + ")";
            var retrievedObject = gl.getIndexedParameter(test.retrieveConstant, i);
            verifyTestExpandos(retrievedObject, msg, i);
            shouldBeType(retrievedObject,