Ok, so i installed coc.nvim with neobundle, by adding to my .vimrc
NeoBundle 'neoclide/coc.nvim'
after this i added
:CocInstall coc-rust-analyzer
to the same file as it mentioned in the guide. But even after I'm sure that CocInstall command is working, I'm still facing this error:
Not an editor command :CocInstall coc-rust-analyzer
while trying to open vim.