on_map question?

[zgpio]

Warning: I will close the bug issue without the minimal init.vim and the reproduce ways.

Problems summary

I can't understand the sentence in dein-options-on_map，see red box in the picture below:

[Shougo]

It means

		call dein#add('osyo-manga/vim-anzu', {'on_map': '<Plug>(anzu-'})

is same with

		call dein#add('osyo-manga/vim-anzu', {'on_map': '<Plug>(anzu-foo)'})