Function publish 

pub fn publish<T: PublishKind>(
    topic: impl AsRef<str>,
    value: T,
) -> Result<(), PublishError<<<T as PublishKind>::Encoding as Encode>::Error>>

Publish a message to a topic in the cache this Function is running within.

Examples:

---

String:

use momento_functions_host::topics::PublishError;

fn f() -> Result<(), PublishError<&'static str>> {
topics::publish("my_topic", "hello there")?;

---

Bytes:

use momento_functions_host::topics::PublishError;

fn f() -> Result<(), PublishError<&'static str>> {
topics::publish("my_topic", b"hello there".to_vec())?;

---

Json:

use momento_functions_host::encoding::Json;///

use momento_functions_host::topics::PublishError;

#[derive(serde::Serialize)]
struct MyStruct {
   hello: String
}

topics::publish("my_topic", Json(MyStruct{ hello: "hello".to_string() }))?;