language-server: fix MXML instances being included when getting embedded AS3 nodes in MXML specifiers

This could lead to iterating over the same nodes more than once because the specifiers are children of the instance.

Author: joshtynjala

language-server/src/main/java/com/as3mxml/vscode/utils/ActionScriptProjectManager.java

@@ -48,6 +48,7 @@
 import org.apache.royale.compiler.tree.mxml.IMXMLNode;
 import org.apache.royale.compiler.tree.mxml.IMXMLPropertySpecifierNode;
 import org.apache.royale.compiler.tree.mxml.IMXMLSingleDataBindingNode;
+import org.apache.royale.compiler.tree.mxml.IMXMLSpecifierNode;
 import org.apache.royale.compiler.units.ICompilationUnit;
 import org.apache.royale.utils.FilenameNormalization;
 import org.eclipse.lsp4j.DocumentSymbol;
@@ -308,7 +309,7 @@ public List<IASNode> getEmbeddedActionScriptNodesInMXMLTag(IMXMLTagData tag, Pat
                 continue;
             }
             IASNode offsetNode = getOffsetNode(path, attributeData.getAbsoluteStart(), projectData);
-            if (offsetNode == null) {
+            if (offsetNode == null || !(offsetNode instanceof IMXMLSpecifierNode)) {
                 continue;
             }
             IClassDefinition tagDefinition = (IClassDefinition) resolvedDefinition;