public static bool IsCorrected(this InvoiceAmendmentFlags status)
 {
     return((status & InvoiceAmendmentFlags.Corrected) == InvoiceAmendmentFlags.Corrected);
 }
 public static bool IsAmendmentRequested(this InvoiceAmendmentFlags status)
 {
     return((status & InvoiceAmendmentFlags.AmendmentRequested) == InvoiceAmendmentFlags.AmendmentRequested);
 }
 public static bool IsRevised(this InvoiceAmendmentFlags status)
 {
     return((status & InvoiceAmendmentFlags.Revised) == InvoiceAmendmentFlags.Revised);
 }