pendingCount property
Number of HTTP requests currently in flight on Magic's network driver,
surfaced via the interceptor's FIFO _pending list.
Pre-install (or post-uninstall) _interceptor is null and the getter
short-circuits to 0 ; the null-guard keeps TelescopeStore.pendingHttpCount
safe to call from a poll loop before install runs.
Implementation
@override
int get pendingCount => _interceptor?._pending.length ?? 0;