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: getframe.m
    path of file: ./repos/EEGapp/EEGapp/custom_stuff/Chronux/chronux_2_12/fly_track/videoIO/videoIO_2006a/@videoReader
    
    the code of the file until where you have to start completion: function frame = getframe(vr)
%FRAME=GETFRAME(VR)
%  Returns the current frame that has been read in from video VR.  Calling

    
function frame = getframe(vr)
%FRAME=GETFRAME(VR)
%  Returns the current frame that has been read in from video VR.  Calling
%  GETFRAME does not automatically advance the current frame so the user
%  must first call NEXT, STEP, or SEEK before calling GETFRAME the
%  first time.  This makes it easy to write loops such as:
%    vr = videoReader(...);
%    while (next(vr))
%      img = getframe(vr);
%      ...do something...
%    end