Return the priority of this node.
Return true if this node has priority over the given node, false otherwise.
A node to compare the priority of this node to.
Pointer to the next node in the priority set.
If the given node is considered a duplicate of this node, then update this node if needed, and return true. Return false otherwise.
A node that may or may not be a duplicate of this node.
Interface for prioritized elements than be hooked into a linked list.