in agent/native/ext/util.h [242:258]
String spacialInvisibleCharToSymbol( char c )
{
switch ( c )
{
case '\0': return "\\0";
case '\a': return "\\a";
case '\b': return "\\b";
case '\f': return "\\f";
case '\n': return "\\n";
case '\r': return "\\r";
case '\t': return "\\t";
case '\v': return "\\v";
default:
return NULL;
}
}