code: protected void generateColumnStart(UIComponent child, String colStyleClass, ResponseWriter writer) throws IOException {
  		writer.startElement("div", child);
  		writer.writeAttribute("class", colStyleClass, "class");
  	}
docs: Generates the start of each Bootstrap column.
  
  @param child
  the child component to be drawn within the column.
  @param colStyleClass
  the current CSS style class
  @param writer
  the current response writer.
  @throws IOException
  if something's wrong with the response writer.