vim-airline -- where/what is the guard to disable the plugin?

[githubhwi]

I do not see the name of the guard so that I can set its value to 1 in my .vimrc and disable the plugin(s).

My .vimrc file looks like this:

call plug#begin()
Plug 'vim-airline/vim-airline'
Plug 'vim-airline/vim-airline-themes'
call plug#end()

Please advise on how to use (or add) a guard.

[chrisbra]

It's right here:

vim-airline/plugin/airline.vim

Lines 9 to 12 in 8e36c0a

	if &cp || v:version < 702 || (exists('g:loaded_airline') && g:loaded_airline)
	finish
	endif
	let g:loaded_airline = 1