FieldType.getValueSource()

[Grant Ingersoll]

On FieldType, the getValueSource(SchemaField, QParser) implementation just 
calls the deprecated getValueSource(SchemaField) method.  
/** called to get the default value source (normally, from the
   *  Lucene FieldCache.)
   */
  public ValueSource getValueSource(SchemaField field, QParser parser) {
    return getValueSource(field);
  }

What is the intent of the QParser being passed in?  If I'm writing my own 
QParser that needs to get some ValueSource for a Field, do I pass in this or do 
I need to pass in some other QParser?

Thanks,
Grant