Advances the descriptor's next-index counter by one.
Declared in <wallet/scriptpubkeyman.h>
[[requires_capability(0x7f94fd518f08), requires_capability(0x7f95058b90a8), requires_capability(0x7f94f1e43e68), requires_capability(0x7f9505cb2b88), requires_capability(0x7f94f23e4388), requires_capability(0x7f94fd840ac8)]]
void
IncIndex();