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: create_roms_netcdf_bndry_mwUL.m
    path of file: ./repos/tracacode/1911-COAWST/script/mfiles/roms_clm
    
    the code of the file until where you have to start completion: function create_roms_netcdf_bndry_mwUL(fn,gn,t_clim)
%
% jcw April 18, 2009
% updated 01Sep2015 to have all 4 sides
%    for all the vars.
%

% Get some grid info. 
  [LP,MP]=size(gn.lon_rho);
  L=LP-1;
  Lm=L-1;
  M=MP-1;
  Mm=M-1;
  L  = Lm+1;
  M  = Mm+1;
  xpsi  = L;
  xrho  = LP;
  xu    = L;
  xv    = LP;
  epsi = M;
  erho = MP;
  eu   = MP;
  ev   = M;
  s    = gn.N;

    
function create_roms_netcdf_bndry_mwUL(fn,gn,t_clim)
%
% jcw April 18, 2009
% updated 01Sep2015 to have all 4 sides
%    for all the vars.
%

% Get some grid info. 
  [LP,MP]=size(gn.lon_rho);
  L=LP-1;
  Lm=L-1;
  M=MP-1;
  Mm=M-1;
  L  = Lm+1;
  M  = Mm+1;
  xpsi  = L;
  xrho  = LP;
  xu    = L;
  xv    = LP;
  epsi = M;
  erho = MP;
  eu   = MP;
  ev   = M;
  s    = gn.N;

%% create bndry file
nc_bndry=netcdf.create(fn,'clobber');
if isempty(nc_bndry), return, end