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