Declan Naughton declann

https://vega.github.io/vega-lite/docs/selection.html#nearest

"The nearest property is not supported for multi-element mark types (i.e., line and area). For these mark types, consider layering a discrete mark type (e.g., point) with a 0-value opacity as in the last example above."

https://vega.github.io/vega-lite/docs/layer.html

"Note: Specifications inside layer cannot use row and column channels as layering facet specifications is not allowed. Instead, use the facet operator and place a layer inside a facet."

	{
	"$schema": "https://vega.github.io/schema/vega/v5.json",
	"width": 700,
	"height": 400,
	"padding": 5,
	"data": [
	{
	"name": "table",
	"values": [
	{"category": 1960, "amount": 4},

	{
	"$schema": "https://vega.github.io/schema/vega/v5.json",
	"width": 700,
	"height": 400,
	"padding": 5,
	"data": [
	{
	"name": "table",
	"values": [
	{"category": 1960, "amount": 4},

	{
	"$schema": "https://vega.github.io/schema/vega/v5.json",
	"width": 600,
	"height": 200,
	"padding": 5,
	"data": [
	{
	"name": "table",
	"values": [
	{"category": 1960, "amount": 4},

	{
	"$schema": "https://vega.github.io/schema/vega/v5.json",
	"width": 600,
	"height": 200,
	"padding": 5,
	"data": [
	{
	"name": "table",
	"values": [
	{"category": 1960, "amount": 4},

	{
	"$schema": "https://vega.github.io/schema/vega/v5.json",
	"width": 400,
	"height": 200,
	"padding": 5,
	"data": [
	{
	"name": "table",
	"values": [
	{"category": "A", "amount": 28},

	{
	"$schema": "https://vega.github.io/schema/vega/v5.json",
	"background": "white",
	"padding": 5,
	"width": 700,
	"style": "cell",
	"data": [
	{
	"name": "source_0",
	"values": [

	{
	"data": {
	"values": [
	{
	"age_in": 36,
	"age_opening_in": 30,
	"age_closing_in": 36,
	"model_id": 0,
	"input_cursor_id": 0,
	"formula": "projected_fund_value",

	{
	"data": {"name": "data"},
	"mark": {"type": "line", "tooltip": true},
	"encoding": {
	"color": {"field": "zero_year_in", "type": "ordinal"},
	"x": {
	"field": "year_in",
	"type": "quantitative",
	"scale": {},
	"axis": {"grid": false}