NativeConverter.setSubstitutionChars(converterHandle,subChars,subChars.length);
ec = NativeConverter.setSubstitutionChars(converterHandle,subChars,subChars.length);
    public final void setSubstitutionMode(boolean doSub) {        if(doSub){            NativeConverter.setSubstitutionChars(converterHandle,subChars,subChars.length);        }else{            NativeConverter.setSubstitutionChars(converterHandle,null,0);        }    }