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: displayBVPinfo.m
    path of file: ./repos/chebfun/@chebgui
    
    the code of the file until where you have to start completion: function varargout = displayBVPinfo(handles, mode, varargin)
%DISPLAYBVPINFO   Show information on the CHEBGUI figure when solving BVPs.
%
% Calling sequence:
%   VARARGOUT = DISPLAYBVPINFO(HANDLES, MODE, VARARGIN)
% where
%   VARARGOUT when MODE = 'INIT':
%       VARARGOUT{1}:   Dummy output, required for consistency with the
%                       chebop/displayInfoInit method.
%       VARARGOUT{2}:   A tic/toc timer.
%   VARARGOUT when MODE = 'ITER':
%       VARARGOUT{1}:   A tic/toc timer.
%       VARARGOUT{2}:   Boolean variable, equal to 1 if the user pressed the
%                       'Stop' button on the GUI. 
%   HANDLES:            The MATLAB handle to the CHEBGUI figure.
%   VARARGIN:           Useful input arguments for showing information, further
%                       described in 'help chebop/displayInfo'.
%
% See also: chebop/d
    
function displayBVPInfoFinal(handles, u, delta, iterNo, errEstDE, errEstBC, ...
	displayFig, displayTimer, pref) %#ok<INUSL>
%DISPLAYBVPINFOFINAL   Utility routine for displaying nonlinear solve progress.
%
%  This method prints out information after Newton iteration finishes when
%  problems are solved using CHEBGUI.
%
% See also: displayBVPInfo, chebop/displayInfoFinal

% How many steps did we need
if ( iterNo == 1 )
    finalStr = {'Newton''s method converged in 1 iteration\n'};
else
    finalStr = {sprintf('Newton''s method converged in %i iterations.',....
        iterNo)};
end

% Show what discretization was used
if ( strcmpi(func2str(pref.discretization), 'coeffs') || ...
        isequal(pref.discretization, @ultraS) || ...
        isequal(pref.discretization, @trigspec))
    discString = 'Coefficients';
else
    discString = 'Values';
end
finalStr = [finalStr; sprintf('Discretization basis used: %s.', ...
    discString)];
    
% Print info about the final error estimates...
finalStr = [finalStr; ...
    sprintf('Final error estimate: %.2e (differential equation) ', errEstDE)];
% ...and the error in the boundary conditions.
finalStr = [finalStr; ...
    sprintf('%30.2e (boundary conditions).', errEstBC)];

% Update the iteration information on the GUI
currString = get(handles.iter_list, 'String');
set(handles.iter_list,'String', [currString ; finalStr]);

% Set focus to bottom of printed list
set(handles.iter_list, 'Value', iterNo + 4);

end