Export labels when using the option "fieldtoappend"

[champ]

When using the option fieldtoappend, labels are not exported.

Seems like the solution is to change this line main.go:401:

ch <- prometheus.MustNewConstMetric(desc, GetMetricType(metric, metricsType), value)

for

ch <- prometheus.MustNewConstMetric(desc, GetMetricType(metric, metricsType), value, labelsValues...)

Is there any limitation preventing the labels to be exported in this case?

Best/ Hampus