return null;
String s =null; try{ if (vn.atTerminal){ if (vn.getTokenType(vn.LN) == VTDNav.TOKEN_CDATA_VAL ) s= vn.toRawString(vn.LN); s= vn.toString(vn.LN); } s= vn.toString(vn.getCurrentIndex()); return normalize(s); } catch(NavException e){ return ""; }
	private String normalizeSpace(VTDNav vn){	    if (argCount()== 0){	        return null;	    } else if (argCount() == 1){	        return null;	    }	    throw new IllegalArgumentException		("normalize-space()'s argument count is invalid");	    //return null;	}