function varargout = docroot(topic)
% Copyright 2015-2016 The MathWorks, Inc.
msg = '';
if nargin > 0 && ((ischar(topic) && isrow(topic)) || ...
        (isstring(topic) && isscalar(topic)))
    msg = getString(message('MCR:docroot:DocRoot', char(topic)));
end

warning(message('MCR:docroot:NoHelp',msg));

% In order to not error, pass out empty char
if nargout
    varargout{1} = '';
end
