force_invalid_e

Description:

[ Version ( since = "4.2.10" ) ]
public void force_invalid_e (owned Error? error)

Forces a holder to be invalid; to set it valid again, a new value must be assigned to it using set_value or take_value.

this's value is set to null.

this	a Holder object
error	a Error explaining why this is declared invalid, or `null`