abstract fun binaryValue(): Buffer
Return the binary value.
JSON itself has no notion of a binary, this extension complies to the RFC-7493, so this method assumes there is a String value with the key and it contains a Base64 encoded binary, which it decodes if found and returns.
java.lang.ClassCastException - if the value is not a String
java.lang.IllegalArgumentException - if the String value is not a legal Base64 encoded value
Return
the binary value or null if the event has no JSON value