Advances the descriptor's next-index counter by one.
Declared in <wallet/scriptpubkeyman.h>
[[requires_capability(0x7f2e1dcac458), requires_capability(0x7f2e111ba678), requires_capability(0x7f2e15ef1638), requires_capability(0x7f2e23730498), requires_capability(0x7f2e26613058), requires_capability(0x7f2e2357df48)]]
void
IncIndex();