code: protected String bodyInsertContent(ReplayParseContext context) {
  		if (jspInsertPath == null)
  			return null;
  		JSPExecutor jspExec = context.getJspExec();
  		// FIXME bad chain of references. add method to ReplayParseContext?
  		WaybackRequest wbRequest = jspExec.getUiResults().getWbRequest();
  		// isAnyEmbeddedContext() used as shorthand for (isFrameWrapperContext()
  		// && isIFrameWrapperContext()).
  		if (wbRequest.isAnyEmbeddedContext())
  			return null;
  		try {
  			return jspExec.jspToString(jspInsertPath);
  		} catch (ServletException ex) {
  			LOGGER.log(Level.WARNING, "execution of " + jspInsertPath +
  					" failed", ex);
  			return null;
  		} catch (IOException ex) {
  			LOGGER.log(Level.WARNING, "erorr executing " + jspInsertPath, ex);
  			return null;
  		}
  	}
docs: return body-insert text.
  <p>Run {@code jspInsertPath} and return its output as String.
  if {@code jspInsertPath} is {@code null}, or body-insert should not be
  inserted into the resource being processed, returns {@code null}.</p>
  @param context context for the resource being processed
  @return insert text as String, or {@code null} if no insertion shall be
  made.