docs: @Override
  	public boolean isReadOnly(ELContext context, Object base, Object property) {
  		if (context == null) {
  			throw new NullPointerException("context is null");
  		}
  		if (isResolvable(base)) {
  			toIndex((List<?>) base, property);
  			context.setPropertyResolved(true);
  		}
  		return readOnly;
  	}