code: public void setBillingGroups(java.util.Collection<GroupNameAndArn> billingGroups) {
          if (billingGroups == null) {
              this.billingGroups = null;
              return;
          }
  
          this.billingGroups = new java.util.ArrayList<GroupNameAndArn>(billingGroups);
      }
docs: <p>
  The list of billing groups.
  </p>
  
  @param billingGroups
  The list of billing groups.