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: save_to_base.m
    path of file: ./repos/malini/Classifiers/RCE/classify
    
    the code of the file until where you have to start completion: function save_to_base(overwrite)
%
% save_to_base() copies all variables in the calling function to the base
% workspace.  This makes it possible to examine a function's internal
% variables from the Matlab command prompt after the calling function
% terminates.
%
% If the optional argument "overwrite" is present and has a non-zero value,
% variables in the workspace of the caller will overwrite variables in the
% base workspace having the same name.  Otherwise, preexisting variables in
% the base workspace will not be overwritten.
%
% Phillip M. Feldman

% Version 1.1, 18 Aug. 2009: Added fix to exclude 'ans' variable.
%
% Version 1.0, 2 June 2009: Initial version.
%
% Note: I'd like to acknowledge assistance from Sean Little of the
% MathWorks.

ws_caller= evalin('caller','who()');

    
function save_to_base(overwrite)
%
% save_to_base() copies all variables in the calling function to the base
% workspace.  This makes it possible to examine a function's internal
% variables from the Matlab command prompt after the calling function
% terminates.
%
% If the optional argument "overwrite" is present and has a non-zero value,
% variables in the workspace of the caller will overwrite variables in the
% base workspace having the same name.  Otherwise, preexisting variables in
% the base workspace will not be overwritten.
%
% Phillip M. Feldman

% Version 1.1, 18 Aug. 2009: Added fix to exclude 'ans' variable.
%
% Version 1.0, 2 June 2009: Initial version.
%
% Note: I'd like to acknowledge assistance from Sean Little of the
% MathWorks.

ws_caller= evalin('caller','who()');

if length(nargin) && overwrite
   % Overwrite preexisting variables:
   variables= ws_caller;
else
   % Do not overwrite preexisting variables:
   ws_base= evalin('base','who()');
   variables= setdiff(ws_caller, ws_base);
end