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A user-defined link to an outside resource.

[edit] Members

UserLink[] children	Not Implemented: An array of child UserLink objects. (Read-only)
bool is_heading	Is this link a heading or category name? If so, it has no url and a list of children. (Read-only)
string title	The title or label for the link (Read-only)
string url	The url to which the link points (Read-only)