question: returns name of the topic concode_field_sep long serialVersionUID concode_elem_sep Pattern NAME_PATTERN concode_elem_sep FastJoiner AT_JOINER concode_elem_sep String topicName concode_elem_sep String subtopicName concode_elem_sep Function<TopicKey,String> TO_ADDRESS concode_elem_sep Function<String,TopicKey> FACTORY concode_elem_sep char SUBCHANNEL_SEPARATOR concode_field_sep Function<String,TopicKey> factory concode_elem_sep TopicKey getRootTopicKey concode_elem_sep TopicKey apply concode_elem_sep String apply concode_elem_sep String getSubtopicName concode_elem_sep String getSubtopicName concode_elem_sep int hashCode concode_elem_sep boolean equals concode_elem_sep String getTopicAddress concode_elem_sep String toString concode_elem_sep Function<TopicKey,String> toAddress
target: String function ( ) { return topicName ; }