@Override
	public Function getValue(Function rowObject, Settings settings, Program program,
			ServiceProvider serviceProvider) throws IllegalArgumentException {
		if (rowObject == null) {
			return null;
		}

		return rowObject;
	}
This table field displays the Function Signature for either the program location or the address
associated with a row in the table.
Ghidra/Features/Base/src/main/java/ghidra/util/table/field/FunctionSignatureTableColumn.java