/**
* Returns boolean value from system property or provided function.
*
* @param propName System property host.
* @param dflt Function that returns {@code Boolean}.
* @return {@code Boolean} value
*/
public static boolean boolValue(String propName, boolean dflt) {
String sysProp = getProperty(propName);
return (sysProp != null && !sysProp.isEmpty()) ? Boolean.getBoolean(sysProp) : dflt;
}
