Resolve "Foldable aspects"

Closes #4 (closed)

src/main/java/org/jastadd/tooling/aspect/AspectFoldingBuilder.java

@@ -40,6 +40,12 @@ public class AspectFoldingBuilder extends FoldingBuilderEx {
         new TextRange(enumBody.getTextRange().getStartOffset() + 1,
           enumBody.getTextRange().getEndOffset() - 1)));
     }
+    Collection<JastAddAspectAnnotationTypeBody> annotationTypeBodies = PsiTreeUtil.findChildrenOfType(root, JastAddAspectAnnotationTypeBody.class);
+    for (final JastAddAspectAnnotationTypeBody annotationTypeBody : annotationTypeBodies) {
+      descriptors.add(new FoldingDescriptor(annotationTypeBody.getNode(),
+        new TextRange(annotationTypeBody.getTextRange().getStartOffset() + 1,
+          annotationTypeBody.getTextRange().getEndOffset() - 1)));
+    }
     Collection<JastAddAspectBlock> aspectBlocks = PsiTreeUtil.findChildrenOfType(root, JastAddAspectBlock.class);
     for (final JastAddAspectBlock block : aspectBlocks) {
       descriptors.add(new FoldingDescriptor(block.getNode(),