getNodeProperties( node, shaderStage = 'any' ) {

		const nodeData = this.getDataFromNode( node, shaderStage );

		return nodeData.properties || ( nodeData.properties = { outputNode: null } );

	}
Returns the properties for the given node and shader stage.

@param {Node} node - The node to get the properties for.
@param {('vertex'|'fragment'|'compute'|'any')} [shaderStage='any'] - The shader stage.
@return {Object} The node properties.