What is ListFolderContinueArg?

What is ListFolderContinueArg?

What do those comments in the code mean? Would it be in any way helpful for me to know what that is saying?

    /// The ListFolderContinueArg struct
    open class ListFolderContinueArg : CustomStringConvertible {

        /// The cursor returned by your last call to listFolder or listFolderContinue.
        public let cursor: String

        public init(cursor: String)

        /// A textual representation of this instance.
        ///
        /// Calling this property directly is discouraged. Instead, convert an
        /// instance of any type to a string by using the `String(describing:)`
        /// initializer. This initializer works with any type, and uses the custom
        /// `description` property for types that conform to
        /// `CustomStringConvertible`:
        ///
        ///     struct Point: CustomStringConvertible {
        ///         let x: Int, y: Int
        ///
        ///         var description: String {
        ///             return "(\(x), \(y))"
        ///         }
        ///     }
        ///
        ///     let p = Point(x: 21, y: 30)
        ///     let s = String(describing: p)
        ///     print(s)
        ///     // Prints "(21, 30)"
        ///
        /// The conversion of `p` to a string in the assignment to `s` uses the
        /// `Point` type's `description` property.
        open var description: String { get }
    }