+=item classname
+
+Returns the name of the usage class (see L<FS::usage_class>) associated with
+this call plan rate.
+
+=cut
+
+sub classname {
+ my $self = shift;
+ my $usage_class = qsearchs('usage_class', { classnum => $self->classnum });
+ $usage_class ? $usage_class->classname : '';
+}
+