# File lib/mongoid/relations/bindings/referenced/one.rb, line 42
          def unbind
            unless _binding?
              _binding do
                target.you_must(metadata.foreign_key_setter, nil)
                target.send(metadata.inverse_setter, nil)
                if metadata.type
                  target.you_must(metadata.type_setter, nil)
                end
              end
            end
          end