def show_xref(self, f_a):
        """
            Display where this field is read or written
        """
        if f_a:
            bytecode._PrintSubBanner("XREF Read")
            xrefs_from = f_a.get_xref_read()
            for ref_class, ref_method in xrefs_from:
                bytecode._PrintDefault(ref_method.get_name())
                bytecode._PrintDefault('\n')

            bytecode._PrintDefault('\n')

            bytecode._PrintSubBanner("XREF Write")
            xrefs_to = f_a.get_xref_write()
            for ref_class, ref_method in xrefs_to:
                bytecode._PrintDefault(ref_method.get_name())
                bytecode._PrintDefault('\n')
Display where this field is read or written