public final char getSurrogateValue(char lead, char trail)
    {
        int offset = getSurrogateOffset(lead, trail);
        if (offset > 0) {
            return m_data_[offset];
        }
        return m_initialValue_;
    }
public final char getSurrogateValue ( char lead , char trail ) { int offset = getSurrogateOffset ( lead , trail ) ; if ( offset > 0 ) { return m_data_ [ offset ] ; } return m_initialValue_ ; }
Get the value associated with a pair of surrogates.
@param lead a lead surrogate
@param trail a trail surrogate