ConnectApi.​FeedElementCapabilitiesInput

In API versions 30.0 and earlier, every feed item supported comments, likes, topics, and so on. In versions 31.0 and later, every feed item (and feed element) can have a unique set of capabilities. If a capability property exists on a feed element, that capability is available, even if the capability property doesn’t have a value. For example, if the ChatterLikes capability property exists on a feed element (with or without a value), the context user can like that feed element. If the capability property doesn’t exist, it isn’t possible to like that feed element. A capability can also contain associated data. For example, the Moderation capability contains data about moderation flags.