// +structType=atomic
message LabelSelector {
  // matchLabels is a map of {key,value} pairs. A single {key,value} in the matchLabels
  // map is equivalent to an element of matchExpressions, whose key field is "key", the
  // operator is "In", and the values array contains only "value". The requirements are ANDed.
  // +optional
  map<string, string> matchLabels = 1;