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: setOptions.m
    path of file: ./repos/d2d/arFramework3/ThirdParty/EvA2/JEInterface/@JEInterface
    
    the code of the file until where you have to start completion: function int = setOptions(int, usrOpts)
% Set the optimization options for the interface. The existing options are
% overwritten by the given setings.
%   parameters:
%       int:    an interface instance

    
function int = setOptions(int, usrOpts)
% Set the optimization options for the interface. The existing options are
% overwritten by the given setings.
%   parameters:
%       int:    an interface instance
%       usrOpts:    a JE options structure

fn=fieldnames(usrOpts);

options = int.opts;

try
    for i=1:length(fn)
        % make sure all option fields and values are valid
        % fn(i)
        % ischar(fn(i))
        makeOptions(int, char(fn(i)), usrOpts.(char(fn(i))));
        options.(char(fn(i))) = usrOpts.(char(fn(i)));
    end