function _getIconUrl(sParamName) {
		return Parameters.get({
			name: [sParamName],
			_restrictedParseUrls: true
		});
	}
Determines if the <code>FormContainer</code> is visible or not. Per default it
just returns the value of the <code>visible</code> property.
But this might be overwritten by inherited elements.

For rendering by <code>FormLayouts</code> this function has to be used instead of
<code>getVisible</code>.

@returns {boolean} If true, the <code>FormContainer</code> is visible, otherwise not
@public