如何在不进入子目录的情况下迭代目录

Lets say I have the following directory structure:

RootDir
---SubDir1
------SubSubDir
---------file1
---------file2
---SubDir2
---SubDir3
---file3
---file4

I want to iterate only over the contents of the RootDir(SubDir1, Subdir2, Subdir3, file3, file 4) and check if it is a dir or a file, without entering into the subdirectories, like filepath.Walk does.

Is there any way to do this in the Go library ?

edit:

files, err := os.Open("c:\\Documents")
file, err := files.Readdir(0)

if err != nil {
    fmt.Printf("Error: %s
", err)
}

for f := range file {
    fmt.Println(f.IsDir())
}

So here I am trying to iterate trough the FileInfo, which is a slice, and check for every file if it is a directory, but I always get this error:

f.IsDir undefined (type int has no field or method IsDir)

You can read a directory by opening it with os.Open and the returned *os.File has a Readdir() method which gives os.FileInfos for the direct folder content and these FileInfo have an IsDir() method.