overrid action perform action event action perform todo multipl level element project us namespac current undefin similar project project manag manag current project object ns namespac ns valid namespac ns argo diagram diagram creat diagram ns diagram diagram return concret add member diagram todo make explor listen project member properti chang elimin coupl gui explor event adaptor instanc model element ad diagram namespac target manag instanc set target diagram defin log lp log local nest statement lp log granular type statement log error valid namespac endif illeg state except valid namespac 