toJson method
Implementation
Map<String, dynamic> toJson() {
final exact = this.exact;
final prefix = this.prefix;
final range = this.range;
final regex = this.regex;
final suffix = this.suffix;
return {
if (exact != null) 'exact': exact,
if (prefix != null) 'prefix': prefix,
if (range != null) 'range': range,
if (regex != null) 'regex': regex,
if (suffix != null) 'suffix': suffix,
};
}