private void assertMembersNamesAreUnique() {
    Map<String, FieldNode> allDslCollectionFieldNodesOfHierarchy = new HashMap<String, FieldNode>();

    for (ClassNode level : ASTHelper.getHierarchyOfDSLObjectAncestors(annotatedClass)) {
      for (FieldNode field : level.getFields()) {
        if (!ASTHelper.isListOrMap(field.getType())) continue;

        String memberName = getElementNameForCollectionField(field);

        FieldNode conflictingField = allDslCollectionFieldNodesOfHierarchy.get(memberName);

        if (conflictingField != null) {
          addCompileError(
              String.format(
                  "Member name %s is used more than once: %s:%s and %s:%s",
                  memberName,
                  field.getOwner().getName(),
                  field.getName(),
                  conflictingField.getOwner().getName(),
                  conflictingField.getName()),
              field);
          return;
        }

        allDslCollectionFieldNodesOfHierarchy.put(memberName, field);
      }
    }
  }
 private String getQualifiedName(FieldNode node) {
   return node.getOwner().getName() + "." + node.getName();
 }