quotedMessageMetadata property
Information about a message that another message quotes.
When you create a message, you can quote messages within the same thread,
or quote a root message to create a new root message. However, you can't
quote a message reply from a different thread. When you update a message,
you can't add or replace the quotedMessageMetadata field, but you can
remove it. For example usage, see
Quote another message.
Optional.
Implementation
QuotedMessageMetadata? quotedMessageMetadata;