Begin building a block by creating the block builder from the transaction graph.
Declared in <txmempool.h>
[[requires_capability(0x7f95135d3ec8), requires_capability(0x7f9501b132a8), requires_capability(0x7f950ec79498), requires_capability(0x7f9525ea91e8), requires_capability(0x7f9515098928), requires_capability(0x7f950826cbc8), requires_capability(0x7f94f85702d8), requires_capability(0x7f9513c5a4c8)]]
void
StartBlockBuilding() const;