private static void checkProgram(Program program) {
		if (program == null || program.isClosed()) {
			throw new IllegalArgumentException(
				"An open program object which corresponds to the specified storage is required");
		}
	}
Determine if current name is a default name.  This is more important for parameters
so always returning false for locals is OK.
@return true if name is reserved as a default name
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/model/listing/VariableImpl.java