- target_label: bar
- source_labels: [aa]
  separator: "foobar"
  regex: "foo.+bar"
  target_label: aaa
  replacement: "xxx"
- action: keep
  source_labels: [aaa]
- action: drop
  source_labels: [aaa]
- action: hashmod
  source_labels: [aaa]
  target_label: aaa
  modulus: 234
- action: replace_all
  source_labels: [aa]
  target_label: bb
- action: labelmap_all
  regex: "\\."
  replacement: ":"