pub fn topic_configurations(mut self, input: crate::model::TopicConfiguration) -> Self {
            let mut v = self.topic_configurations.unwrap_or_default();
            v.push(input);
            self.topic_configurations = Some(v);
            self
        }
/// Appends an item to `topic_configurations`.
///
/// To override the contents of this collection use [`set_topic_configurations`](Self::set_topic_configurations).
///
/// <p>The topic to which notifications are sent and the events for which notifications are generated.</p>
Appends an item to `topic_configurations`.
To override the contents of this collection use [`set_topic_configurations`](Self::set_topic_configurations).

The topic to which notifications are sent and the events for which notifications are generated.
Appends an item to ` topic_configurations ` . To override the contents of this collection use [ ` set_topic_configurations ` ] ( Self :: set_topic_configurations ) . The topic to which notifications are sent and the events for which notifications are generated .
pub fn topic_configurations(mut self, input: crate::model::TopicConfiguration) -> Self {
            let mut v = self.topic_configurations.unwrap_or_default();
            v.push(input);
            self.topic_configurations = Some(v);
            self
        }
pub fn topic_configurations ( mut self , input : crate :: model :: TopicConfiguration ) -> Self { let mut v = self . topic_configurations . unwrap_or_default ( ) ; v . push ( input ) ; self . topic_configurations = Some ( v ) ; self }
Appends an item to `topic_configurations`.
Appends an item to ` topic_configurations ` .
mut self
input
crate::model::TopicConfiguration
mut self
input
crate::model::TopicConfiguration