sequence property Null safety

Substituted_Sequence sequence
@TagNumber(2)

Implementation

@$pb.TagNumber(2)
Substituted_Sequence get sequence => $_getN(1);
void sequence=(Substituted_Sequence v)
@TagNumber(2)

Implementation

@$pb.TagNumber(2)
set sequence(Substituted_Sequence v) { setField(2, v); }