code: public java.util.List<PolicyUser> getPolicyUsers() {
          if (policyUsers == null) {
              policyUsers = new com.amazonaws.internal.SdkInternalList<PolicyUser>();
          }
          return policyUsers;
      }
docs: <p>
  A list of IAM users that the policy is attached to.
  </p>
  
  @return A list of IAM users that the policy is attached to.