ExtractLine constructor
CTOR the fields are optional, if omitted they will be filled with defaults .
Implementation
ExtractLine({JrlLine? line, int sumup = 0}) {
if(line != null) {
datum = line.datum;
kplus = line.kplus;
kminus = line.kminus;
desc = line.desc;
cur = line.cur;
valuta = line.valuta;
limits = line.limits;
}
actSum = sumup ;
}