code: public static String qualifier(String qualifiedName) {
  		int loc = qualifiedName.lastIndexOf('.');
  		if (loc < 0)
  			return "";
  
  		return qualifiedName.substring(0, loc);
  	}
docs: Returns the qualifier for a name separated by dots. The qualified part is
  everything up to the last dot separator.
  
  @param qualifiedName The qualified name.
  @return The qualifier portion.