toJson method
Implementation
Map<String, dynamic> toJson() {
final n = this.n;
final s = this.s;
final sdm = this.sdm;
final sl = this.sl;
return {
if (n != null) 'N': n,
if (s != null) 'S': s,
if (sdm != null) 'SDM': sdm,
if (sl != null) 'SL': sl,
};
}