index.js
function (path, done) {
            fs.access(path, fs.R_OK, function (error) {
              done(!error)
            })
          }
function (path, done) {
            fs.access(path, fs.R_OK, function (error) {
              done(!error)
            })
          }
function ( path , done ) { fs . access ( path , fs . R_OK , function ( error ) { done ( ! error ) } ) }
Can we read the file?
Can we read the file?