Controls whether the top generation is garbage-collected.
hcl
collect-highest-generation flag
flag
If flag is non- nil , the top generation is collected; if flag is any other value, the top generation is not collected. The default is nil .
nil
collect-highest-generation returns no values.
collect-highest-generation
avoid-gc clean-generation-0 collect-generation-2 expand-generation-1 normal-gc