code: public void setFileTypes(final String[] types) {
  		if (types == null) {
  			setFileTypes((List<String>) null);
  		} else {
  			setFileTypes(Arrays.asList(types));
  		}
  	}
docs: Set each file type to be accepted by the WFileWidget.
  
  @see #setFileTypes(java.util.List)  for the file types
  
  @param types The file types that will be accepted by the file input.