private boolean isValidBuiltinDropSite(GTreeNode destinationNode) {
		if (!(destinationNode instanceof CategoryNode)) {
			return true;
		}
		CategoryNode categoryNode = (CategoryNode) destinationNode;
		return (categoryNode instanceof ArchiveNode);
	}
Verifies the given destination node can accept the given drop/copy/paste action and content
flavors.
@param destinationNode the node accepting the action
@param flavors the supported flavors of the action
@param dropAction the actual action see {@link DnDConstants}
@return true if valid
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/datamgr/tree/DataTypeDragNDropHandler.java