You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: LandmarkMap.m
    path of file: ./repos/Robotics-Toolbox/rvctools/release10.3.1/robot
    
    the code of the file until where you have to start completion: %LandmarkMap Map of planar point landmarks
%
% A LandmarkMap object represents a square 2D environment with a number of landmark
% landmark points.
%
% Methods::
%   plot      Plot the landmar
    
function s = char(map)
        %map.char Convert map parameters to a string
        %
        % s = M.char() is a string showing map parameters in 
        % a compact human readable format. 
            s = 'LandmarkMap object';
            s = char(s, sprintf('  %d landmarks', map.nlandmarks));
            s = char(s, sprintf('  dimension %.1f', map.dim));
        end