A hard line break.

public final class HardLineBreak: Node

From the CommonMark Spec:

6.9 Hard line breaks

A line break (not in a code span or HTML tag) that is preceded by two or more spaces and does not occur at the end of a block is parsed as a hard line break (rendered in HTML as a <br /> tag):

Node, Visitable

public convenience init()

public func accept<T: Visitor>(visitor: T)