@Override
	public boolean equals(Object obj) {

		if (obj == null) {
			return false;
		}
		if (this == obj) {
			return true;
		}
		if (getClass() != obj.getClass()) {
			return false;
		}
		DomainFileNode node = (DomainFileNode) obj;
		if (domainFile.equals(node.domainFile)) {
			return true;
		}
		return false;
	}
Get the domain file if this node represents a file object versus a folder; interface method
for DomainDataTransfer.

@return null if this node represents a domain folder
Ghidra/Framework/Project/src/main/java/ghidra/framework/main/datatree/DomainFileNode.java