How does setting multiple plugins work?

[depesz]

In the doc I see that you use:

set -g @plugin 'tmux-plugins/tpm'
set -g @plugin 'tmux-plugins/tmux-sensible'

The thing is that after running this @plugin will have value of 'tmux-plugins/tmux-sensible' - so how does that work that it would load them both?

Do you grep the plugin names out of config?