LCPExtensionFor
KPPPLCPExtension *lcpExtension = LCPExtensionFor(data.code, &index);
for (; lcpExtension; lcpExtension = LCPExtensionFor(data.code, &(++index))) {
KPPPLCPExtension *LCPExtensionFor(uint8 code, int32 *start = NULL) const;