//   - 'map': `X + Y` performs a merge where the array positions of all keys in `X` are preserved but the values
  //     are overwritten by values in `Y` when the key sets of `X` and `Y` intersect. Elements in `Y` with
  //     non-intersecting keys are appended, retaining their partial order.
  // Required.
  optional string Expression = 1;

  // system may or may not try to eventually evict the pod from its node.
  // When there are multiple elements, the lists of nodes corresponding to each
  // podAffinityTerm are intersected, i.e. all terms must be satisfied.
  // +optional
  repeated PodAffinityTerm requiredDuringSchedulingIgnoredDuringExecution = 1;

  // The scheduler will prefer to schedule pods to nodes that satisfy