vlt.file.isfolder

 ISFILE - Searches for a file with name foldername within the existing path

    B = vlt.file.isfolder(foldername)

    B is 1 if foldername is a folder located on the specified path or in the
    current folder, and 0 if no folder is found.

    Note: isfolder is a function found on Matlab versions R2017b and after. 
    Function b uses exist(foldername, 'file') if this is the case
    Unless the absolute path for foldername is specified, exist(foldername,
    'file') will search all files and folders in the search path.