assertSeparatorVisibility = function(assert, oFCL, iBeginColumnSeparatorVisible, iMidColumnSeparatorVisible) {
		var bBeginSeparatorOK = oFCL.$("separator-begin").is(":visible") === !!iBeginColumnSeparatorVisible,
			bMidSeparatorOK = oFCL.$("separator-end").is(":visible") === !!iMidColumnSeparatorVisible;

		assert.ok(bBeginSeparatorOK, "The begin separator is " + (iBeginColumnSeparatorVisible ? "" : " not ") +  " visible");
		assert.ok(bMidSeparatorOK, "The end separator is " + (iMidColumnSeparatorVisible ? "" : " not ") +  " visible");
	}
Utility function to easily verify arrows visibility
@param {object} assert - the assert object passed to the test case
@param {object} oFCL - the instance that is tested upon
@param {int} iBeginColumnSeparatorVisible - whether we expect the begin-separator to be visible
@param {int} iMidColumnSeparatorVisible - whether we expect the end-separator to be visible