Whether a changeset is currently outstanding against this mempool.
Declared in <txmempool.h>
[[guarded_by(0x7fd7537bafa8), guarded_by(0x7fd74eec7938), guarded_by(0x7fd75e708f88), guarded_by(0x7fd759895758), guarded_by(0x7fd75ce07728), guarded_by(0x7fd759f70bb8), guarded_by(0x7fd75b830df8), guarded_by(0x7fd73e8af058)]]
bool m_have_changeset = {false};