function txt=obj2json(name,item,level,varargin)

if(iscell(item))
    txt=cell2json(name,item,level,varargin{:});
elseif(isstruct(item))
    txt=struct2json(name,item,level,varargin{:});
elseif(ischar(item))
    txt=str2json(name,item,level,varargin{:});
elseif ~verLessThan('matlab','9.1') && isstring(item)
    % versions 2016b (9.1) and higher AND item is a string object
    % version check is necessary because function isstring existst only since 2016b

    % There's a new string class with " " syntax since 2016b (9.1) with the following characteristic:
    % isobject("String") returns true
    % isstring("String") returns true
    % ischar("String") returns false
    %
    % vs. character arrays with ' ' syntax:
    % isobject('chararr') returns false
    % isstring('chararr') returns false
    % ischar('chararr') returns true

    % Don't know if this is correct in every case:
    % convert string to char by: item{:}
    txt=str2json(name,item{:},level,varargin{:});
elseif(isobject(item)) 
    txt=matlabobject2json(name,item,level,varargin{:});
else
    txt=mat2json(name,item,level,varargin{:});
end