@property<EOL><INDENT>def quality(self):<DEDENT>
if self.metric_value is None:<EOL><INDENT>return <NUM_LIT:0><EOL><DEDENT>return <NUM_LIT:6><EOL>
Quality is a number between 1 and 6 that rates the quality of the link.
The way quality is calculated might be overridden by settings.
0 means unknown