getElementType( builder ) {

		const type = this.getNodeType( builder );
		const elementType = builder.getElementType( type );

		return elementType;

	}
Certain types are composed of multiple elements. For example a `vec3`
is composed of three `float` values. This method returns the type of
these elements.

@param {NodeBuilder} builder - The current node builder.
@return {string} The type of the node.