public boolean isUnknown(Object value)
	{
		return value == null || (value instanceof Set ? ((Set) value).isEmpty() : false);
	}
public boolean isUnknown ( Object value ) { return value == null || ( value instanceof Set ? ( ( Set ) value ) . isEmpty ( ) : false ) ; }
Checks if the <em>value</em> is unkown. In this context a <em>value</em> is regarded to be
unknown if it is null (unset).
@param value the value to be checked
@return true if the value is unknown