in src/meter/id.ts [52:61]
private validate_tags(tags: Tags): Tags {
const valid_tags: Record<string, string> = validate_tags(tags);
if (Object.entries(tags).length != Object.entries(valid_tags).length) {
this._logger.warn(`Id(name=${this._name}, tags=${tags_toString(tags)}) is invalid due to tag keys or values which are ` +
`zero-length strings; proceeding with truncated tags Id(name=${this._name}, tags=${tags_toString(valid_tags)})`);
}
return valid_tags;
}