v2 property Null safety
Implementation
XdrPreconditionsV2? get v2 => this._v2;
Implementation
set v2(XdrPreconditionsV2? value) => this._v2 = value;
XdrPreconditionsV2? get v2 => this._v2;
set v2(XdrPreconditionsV2? value) => this._v2 = value;