Function partition0_leader_from_metadata 

pub async fn partition0_leader_from_metadata(
    bootstrap: &str,
    topic: &str,
    security: Option<ClientSecurity>,
    dispatch_queue_capacity: ConnectionDispatchQueueCapacity,
    frame_max: ClientFrameMax,
) -> Result<i32>

Queries the topic metadata and returns partition 0’s current leader broker id.

Errors

Returns an error when input data is invalid, required I/O fails, or the destination rejects the generated report or audit event.