Epsilon is a family of Java-based scripting languages for automating common model-based software engineering tasks, such as code generation, model-to-model transformation and model validation, that work out of the box with EMF (including Xtext and Sirius), UML (including Cameo/MagicDraw), Simulink, XML and other types of models.
To reproduce this issue:
org.eclipse.epsilon.examples.picto.socialnetwork
exampleNetwork2Graphviz
rule insocialnetwork.egx
socialnetwork.flexmi
Social Network
tree item in the Picto view