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: stipplem.m
    path of file: ./repos/CDT/cdt
    
    the code of the file until where you have to start completion: function h = stipplem(lat,lon,mask,varargin)
% stipplem creates a hatch filling or stippling in map coordinates. 
% 
%% Syntax
% 
%  stipplem(lat,lon,mask) 
%  stipplem(...,MarkerProperty,MarkerValue,...)
%  stipplem(...,'density',DensityValue) 
%  stipplem(...,'resize',false) 
%  h = stipplem(...)
% 
%% Description
% 
% stipplem(lat,lon,mask) plots black dots in x,y locations wherever a mask contains
% true values. Dimensions of x, y, and mask must all match. 
% 
% stipplem(...,MarkerProperty,MarkerValue,...) specifies any marker properties
% that are accepted by the plot function (e.g., 'color', 'marker', 'markersize', etc). 
%  
% stipplem(...,'density',DensityValue) specifies density of stippling markers. 
% Default density is 100, but if your plot is too crowded you may specify a 
% lower density value (and/or adjust the markersize). 
% 
% stipplem(...,'resize',false) overrides the 'density' option and plots stippling 

    
function h = stipplem(lat,lon,mask,varargin)
% stipplem creates a hatch filling or stippling in map coordinates. 
% 
%% Syntax
% 
%  stipplem(lat,lon,mask) 
%  stipplem(...,MarkerProperty,MarkerValue,...)
%  stipplem(...,'density',DensityValue) 
%  stipplem(...,'resize',false) 
%  h = stipplem(...)
% 
%% Description
% 
% stipplem(lat,lon,mask) plots black dots in x,y locations wherever a mask contains
% true values. Dimensions of x, y, and mask must all match. 
% 
% stipplem(...,MarkerProperty,MarkerValue,...) specifies any marker properties
% that are accepted by the plot function (e.g., 'color', 'marker', 'markersize', etc). 
%  
% stipplem(...,'density',DensityValue) specifies density of stippling markers. 
% Default density is 100, but if your plot is too crowded you may specify a 
% lower density value (and/or adjust the markersize). 
% 
% stipplem(...,'resize',false) overrides the 'density' option and plots stippling 
% at the exact resolution of the input grid. By default, the grids are resized
% because any grid larger than about 100x100 would produce so many stippling
% dots it would black out anything under them. 
% 
% h = stipplem(...) returns a handle of the plotted stippling objects. 
% 
%% Author Info
% This function was written by Chad A. Greene in 2019. 
% 
% See also: stipple and globestipple. 

%% Input wrangling: 

assert(islatlon(lat,lon),'Error: input coordinates appear to be outside the normal range of latitudes and longitudes.') 

% If inputs are arrays, try meshgridding them: 
if all([isvector(lat) isvector(lon)])
   [lon_tmp,lat_tmp] = meshgrid(lon,lat); 

   % If that didn't make the grids line up, try the other way:
   if isequal(size(lat_tmp),size(mask))
      lat = lat_tmp; 
      lon = lon_tmp; 
   else
      [lat,lon] = meshgrid(lat,lon); 
   end