This will make the transition to a new codegen more seamless.
1. Setter should be named as the field itself.
2. Setter should accept 1 parameter.
Signed-off-by: Evgenii Stratonikov <e.stratonikov@yadro.com>
I knew one day `sed` would save me an hour of manual work:
```
sed -i -n -e '
s/) Set/) Set/
p
t setter
b end
:setter
n
s/nil/nil/
t hasif
p
b end
:hasif
n
:loop
p
n
s/}/}/
t end
b loop
:end
' $@
goimports -w $@
```
Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>
