Converts the specified surrogate pair to its supplementary code
point value. This method does not validate the specified
surrogate pair. The caller must validate it using {@link
#isSurrogatePair(char, char) isSurrogatePair} if necessary.
@param high the high-surrogate code unit
@param low the low-surrogate code unit
@return the supplementary code point composed from the
specified surrogate pair.
Converts the specified surrogate pair to its supplementary code point value. This method does not validate the specified surrogate pair. The caller must validate it using {@link #isSurrogatePair(char, char) isSurrogatePair} if necessary.
@param high the high-surrogate code unit @param low the low-surrogate code unit @return the supplementary code point composed from the specified surrogate pair.