code: protected long handleNextCE32() {
          int c = nextCodePoint();
          if(c < 0) { return NO_CP_AND_CE32; }
          return makeCodePointAndCE32Pair(c, data.getCE32(c));
      }
docs: Returns the next code point and its local CE32 value.
  Returns Collation.FALLBACK_CE32 at the end of the text (c<0)
  or when c's CE32 value is to be looked up in the base data (fallback).
  
  The code point is used for fallbacks, context and implicit weights.
  It is ignored when the returned CE32 is not special (e.g., FFFD_CE32).
  
  Returns the code point in bits 63..32 (signed) and the CE32 in bits 31..0.