private static void validate(Program program, List<Namespace> parents)
			throws IllegalArgumentException {
		for (Namespace namespace : parents) {
			validate(program, namespace);
		}
	}
Finds the namespace for the given symbol path <b>that is not a function</b>

@param program the program from which to get the namespace
@param symbolPath the path of namespace names including the name of the desired namespace
@return the namespace represented by the given path, or null if no such namespace exists or
        the namespace is a function
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/app/util/NamespaceUtils.java