code: private int getContainerWidth() {
  
          int containerWidth = -1;
          try {
              containerWidth = Integer.parseInt(m_width);
          } catch (NumberFormatException e) {
              // do nothing, set width to -1
              LOG.debug("Error parsing container width.", e);
          }
          return containerWidth;
      }
docs: Gets the container width as a number.<p>
  
  If the container width is not set, or not a number, -1 will be returned.<p>
  
  @return the container width or -1