Create object from 


===== Nodes =====

-> All objects that are supposed to be added in a groimp project should implement persistence management. 
(project graph & registry)

-> source enhancement

[[05_developer_tutorials:02_extending_groimp:creating-node-class]]

[[05_developer_tutorials:dev-guide:automatic-code-enhancement]]

[[05_developer_tutorials:02_extending_groimp:add-object-as-node-production]]

[[05_developer_tutorials:dev-guide:embedded-file-object]]

[[05_developer_tutorials:dev-guide:disposable-node]]

[[05_developer_tutorials:dev-guide:automatic-conversion]]

[[05_developer_tutorials:dev-guide:base-objects:graph-listeners]]

[[05_developer_tutorials:dev-guide:base-objects:user-pattern]]