This can be a lot of files if you request a very common header! For example -SingleFile=Runtime\Core\Public\Containers\Array.h currently would build over 22k UnrealEditor actions
#rnx
#jira UE-131018
#rb Josh.Adams
#preflight 63daa7a38c7003aa8ca997bd
[CL 23960984 by joe kirchoff in ue5-main branch]