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: CEDS64EditMarker.m
    path of file: ./repos/PsPM/src/Import/CEDS64ML
    
    the code of the file until where you have to start completion: %{
    Copyright (C) Cambridge Electronic Design Limited 2014
    Author: James Thompson
    Web: www.ced.co.uk email: james@ced.co.uk, softhelp
    
function [ iOk ] = CEDS64EditMarker( fhand, iChan, i64Time, cMarker )
%CEDS64EDITMARKER Copies the marker codes in cMarker to the first marker 
%   before time i64Time in channel iChan (note this does not allow you to 
%   change the time of an existing marker)
%   [ iOk ] = CEDS64EditMarker( fhand, iChan, i64Time, cMarker )
%   Inputs
%   fhand - An integer handle to an open file
%   iChan - An integer channel number
%   i64Time - Time in ticks
%   cMarker - The marker to be copied
%   Outputs
%   iOk - 0 if the data was copied correctly, otherwise a negative error
%   code.
if(nargin == 4)
    iOk = calllib('ceds64int', 'S64EditMarker', fhand, iChan, i64Time, cMarker);
else
    iOk = -22;
end