x64 / ntdllntoskrnl /

_SERVER_SILO_MONITOR

← 10.0.10240.21161 2 builds latest →
struct _SERVER_SILO_MONITOR;/* opaque */

Declared but not defined in ntoskrnl's public PDB for this build: a forward declaration, or a name that only appears in mangled C++ symbols. The layout isn't public here.