¿Qué crees que está mal aquí?

Estoy tratando de aplicar diferentes estilos de acuerdo con la línea de un Geojson en Leaflet.js

El error es: SyntaxError no detectado: falta) después de los parámetros formales

 // WFS TFL var startatzoom_tfl = 10; var featureLayer_tfl = new L.GeoJSON( null, { switch (feature.properties.name){ case 'Bakerloo' : style: function(){return { color: #B36305, weight: 13, opacity: 0.7 }}; case 'Central' : style: function(){return { color: #E32017, weight: 13, opacity: 0.7 }}; case 'Circle' : style: function(){return { color: #FFD300, weight: 13, opacity: 0.7 }}; case 'District' : style: function(){return { color: #00782A, weight: 13, opacity: 0.7 }}; case 'Elizabeth' : style: function(){return { color: #9364CD, weight: 13, opacity: 0.7 }}; case 'Hammersmith & City' : style: function(){return { color: #F3A9BB, weight: 13, opacity: 0.7 }}; case 'Jubilee' : style: function(){return { color: #A0A5A9, weight: 13, opacity: 0.7 }}; case 'Metropolitan' : style: function(){return { color: #9B0056, weight: 13, opacity: 0.7 }}; case 'Northern' : style: function(){return { color: #000000, weight: 13, opacity: 0.7 }}; case 'Piccadilly' : style: function(){return { color: #003688, weight: 13, opacity: 0.7 }}; case 'Victoria' : style: function(){return { color: #0098D4, weight: 13, opacity: 0.7 }}; case 'Waterloo & City' : style: function(){return { color: #95CDBA, weight: 13, opacity: 0.7 }}; case 'DLR' : style: function(){return { color: #00A4A7, weight: 13, opacity: 0.7 }}; case 'London Overground' : style: function(){return { color: #EE7C0E, weight: 13, opacity: 0.7 }}; case 'London Trams' : style: function(){return { color: #84B817, weight: 13, opacity: 0.7 }}; case 'Emirates Cable Car' : style: function(){return { color: #E21836, weight: 13, opacity: 0.7 }}; }, onEachFeature: function popUpsome(feature, layer) { if (feature.properties && feature.properties.name) { layer.bindPopup('<h3>' + feature.properties.name + '</h3><br>' + feature.properties.name + '<br><i>' + feature.properties.name + '</i>', {maxWidth: 200}) ; layer.bindTooltip(feature.properties.name); } } });