Default addition
This section presents the default additions in .rgg files. WARNING This is not the case in .xl files 
Annotation
This section should not be called annotation, (even though these are done thought annotation). But TODO later. The “annotation” part is developer part. But the value is modifiable from the user. (In the imaginary case where people would use groimp for a graph other than RGG graph. Or use another type of instantiation by default ).
→ select the default query model ( de.grogra.xl.query.UseModel) . value = de.grogra.rgg.model.Compiletime.class
→ select the default property ( de.grogra.xl.property.UseModel ) . type = Node.class, model = PropertyCompiletime.class
→ set the default super class type (DefaultModuleSuperclass ) . value = Node.class;
→ set the default instantiation producer ( InstantiationProducerType) . value = Instantiation.class
→ set additional compiler extensions ( UseExtension ). value = CompilerExtension.class.
→ use the implicit conversion from Double to FLoat
RGG scope
From the XL implementation, (as in Java) ALL files should have a class with their name. And methods cannot be defined outside of a class.
RGG files are different because they represent the CONTENT of a class (with the name of the file). That class extends RGG.
Class imports
Some package and classes are imported by default in each .rgg files.