vim.api.nvim_set_keymap("i", "<TAB>", [[vsnip#jumpable(1) ? '<Plug>(vsnip-jump-next)' : '<Tab>']], { expr = true })
vim.api.nvim_set_keymap("s", "<TAB>", [[vsnip#jumpable(1) ? '<Plug>(vsnip-jump-next)' : '<Tab>']], { expr = true })
vim.api.nvim_set_keymap("i", "<S-TAB>", [[vsnip#jumpable(1) ? '<Plug>(vsnip-jump-prev)' : '<S-Tab>']], { expr = true })
vim.api.nvim_set_keymap("s", "<S-TAB>", [[vsnip#jumpable(1) ? '<Plug>(vsnip-jump-prev)' : '<S-Tab>']], { expr = true })