b=isExternalM2Child()This function indicates whether the currently-running process is a child process as created by the RunExternalM2 package, or not.
The object isExternalM2Child is a function closure.
The source of this document is in /__w/M2/M2/macaulay2-1.26.05+ds/M2/Macaulay2/packages/RunExternalM2.m2:894:0.