throwAXIfNull(tp_config, "tp_config", sCNSTR);
tpc = tp_config;
GapConfig gc = tp_config.getGapConfig();
UtilGap uGap = new UtilGap();
sTagStart = uGap.getTag(gc.getTagDelimiter(), gc.getTagTextStart());
sTagEnd = uGap.getTag(gc.getTagDelimiter(), gc.getTagTextEnd());
//tpc.getTagTextStart() is definitely not null, so this
//"equals" comparison will not result in an npx.
if(gc.getTagTextStart().equals(gc.getTagTextEnd())) {
throwAX("constructor: tp_config.getGapConfig().getTagTextStart() and tp_config.getGapConfig().getTagTextEnd() are equal ('" + gc.getTagTextStart() + "').");