code: public static final String getQualifiedName(String localName, String pfx) {
  		pfx = pfx == null ? "" : pfx;
  		return pfx.length() == 0 ? localName
  				: (pfx + Constants.COLON + localName);
  	}
docs: Returns qualified name as String
  
  <p>
  QName ::= PrefixedName | UnprefixedName <br>
  PrefixedName ::= Prefix ':' LocalPart <br>
  UnprefixedName ::= LocalPart
  </p>
  
  @param localName
  local-name
  @param pfx
  prefix
  @return <code>String</code> for qname