Milan Kundera the Informant?

As mentioned widely, a historian in Prague has uncovered evidence that Milan Kundera informed on Miroslav Dvoracek, a Czech spy for the West, who subsequently was tortured and spent fourteen years in a labor camp. The Economist notes that:

True or not, the story echoes themes of guilt, betrayal and self-interest found in Mr Kundera’s own work, such as “unbearable lightness” (dodged but burdensome responsibility). In “The Owner of the Keys”, a play published in 1962, the hero kills a witness who sees him sheltering a former lover from the Gestapo.