function JsonFolds()
    local line = vim.fn.getline(vim.v.lnum)
    -- let l:lline = split(l:line, '\zs')
    local inc = vim.fn.count(line, '{')
    local dec = vim.fn.count(line, '}')
    local level = inc - dec
    if level == 0 then
        return '='
    elseif level > 0 then
        return 'a'..level
    elseif level < 0 then
        return 's'..-level
    end
end

vim.opt_local.conceallevel = 0
vim.opt_local.foldnestmax = 5
vim.opt_local.foldmethod = 'marker'
vim.opt_local.foldmarker = '{,}'

vim.opt_local.foldmethod = 'expr'
vim.opt_local.foldexpr = 'v:lua.JsonFolds()'
vim.opt_local.foldenable = false