util_set_x_attribute

Description:

[ Version ( since = "3.26" ) ]
public void util_set_x_attribute (string x_name, string? value)

Sets an "X-" attribute x_name to value value in this, or removes it from this, when value is null.

Parameters:

this

an VCard
x_name

the attribute name, which starts with "X-"
value

the value to set, or null to unset