pub fn knowledge_retract_event(
actor: AgentId,
created_at: i64,
nonce: u64,
payload: KnowledgeRetractPayload,
) -> Event<KnowledgeRetractPayload>pub fn knowledge_retract_event(
actor: AgentId,
created_at: i64,
nonce: u64,
payload: KnowledgeRetractPayload,
) -> Event<KnowledgeRetractPayload>