returns the filter extension or null if no additional filtering is required . concode_field_sep ITypeSelectionComponent fComponent concode_field_sep ISelectionStatusValidator getSelectionValidator concode_elem_sep ITypeInfoImageProvider getImageProvider concode_elem_sep void initialize concode_elem_sep Control createContentArea concode_elem_sep ITypeSelectionComponent getTypeSelectionComponent
ITypeInfoFilterExtension function ( ) { return null ; }