/// <summary>
/// Returns actual total claim fields fee
/// </summary>
private static int ClaimFieldsFee(this Claim claim, int?fieldsFee)
{
if (fieldsFee == null)
{
fieldsFee = claim.FieldsFee ?? claim.CalcClaimFieldsFee();
}
// cache
claim.FieldsFee = fieldsFee;
return(fieldsFee ?? 0);
}