getBaselineCheck(int index) Implementation creates empty Checks as a side-effect, so that Struts' efforts to set fields of lines which haven't been
created will succeed rather than causing a NullPointerException.
Implementation creates empty Checks as a side-effect, so that Struts' efforts to set fields of lines which haven't been
created will succeed rather than causing a NullPointerException.
Parameters: index - baseline Check at the given index