Type guard for TiltifyGraphQLError that also survives realm boundaries (duplicate module instances under bundler optimizeDeps pre-bundling, where instanceof can spuriously fail).
optimizeDeps
instanceof
Any thrown value.
true when err is a Tiltify GraphQL error.
true
err
Type guard for TiltifyGraphQLError that also survives realm boundaries (duplicate module instances under bundler
optimizeDepspre-bundling, whereinstanceofcan spuriously fail).