gcloud alpha compute instance-groups managed all-instances-config

NAME
gcloud alpha compute instance-groups managed all-instances-config - override instance template settings for all instances in a managed instance group
SYNOPSIS
gcloud alpha compute instance-groups managed all-instances-config COMMAND [GCLOUD_WIDE_FLAG …]
DESCRIPTION
(ALPHA) Override instance template settings for all instances in a managed instance group.
GCLOUD WIDE FLAGS
These flags are available to all commands: --help.

Run $ gcloud help for details.

COMMANDS
COMMAND is one of the following:
delete
(ALPHA) Delete values defined in the all-instances configuration of a managed instance group.
update
(ALPHA) Update the all-instances configuration of a managed instance group.
NOTES
This command is currently in alpha and might change without notice. If this command fails with API permission errors despite specifying the correct project, you might be trying to access an API with an invitation-only early access allowlist. These variants are also available: 
gcloud compute instance-groups managed all-instances-config
 
gcloud beta compute instance-groups managed all-instances-config