increaseUsage( node ) {

		const nodeData = this.getDataFromNode( node );
		nodeData.usageCount = nodeData.usageCount === undefined ? 1 : nodeData.usageCount + 1;

		return nodeData.usageCount;

	}
Calling this method increases the usage count for the given node by one.

@param {Node} node - The node to increase the usage count for.
@return {number} The updated usage count.