const f1 = Fn( ( [ { x, y }, a, b, c ], builder ) => {

	if ( a ) console.log( 'f1', x, y, a.value, b.value, c );
	else console.log( 'f1', x, y );
	return x;

} );

const f2 = Fn( ( [ x = .1 ] ) => {

	console.log( 'f2', x );
	return x;

} );

const f3 = Fn( ( [ a, b ], builder ) => {

	console.log( 'f3', a.value, b.value );
	return a;

} );

const f4 = Fn( ( { a, b }, builder ) => {

	console.log( 'f4', a.value, b.value );
	return a;

} );

const f5 = Fn( ( { a, b }, builder ) => {

	console.log( 'f5' );
	return a;

}, { a: 'float', b: 'float', return: 'float' } );

const f6 = Fn( ( [ a, b ], builder ) => {

	console.log( 'f6' );
	return a;

}, { a: 'float', b: 'float', return: 'float' } );

material.colorNode = add(
	f1( { x: .1, y: 2 }, 1, 2, { x: 0 } ),
	f1( { x: .1, y: 2 } ),
	f2(),
	f3( .1, 2 ),
	f4( { a: .1, b: 2 } ),
	f4( .1, 2 ),
	f5( .1, 2 ),
	f5( { a: .1, b: 2 } ),
	f6( .1, 2 ),
	f6( { a: .1, b: 2 } )
);