Index: node_modules/d3-geo/src/transform.js
===================================================================
--- node_modules/d3-geo/src/transform.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
+++ node_modules/d3-geo/src/transform.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
@@ -0,0 +1,26 @@
+export default function(methods) {
+  return {
+    stream: transformer(methods)
+  };
+}
+
+export function transformer(methods) {
+  return function(stream) {
+    var s = new TransformStream;
+    for (var key in methods) s[key] = methods[key];
+    s.stream = stream;
+    return s;
+  };
+}
+
+function TransformStream() {}
+
+TransformStream.prototype = {
+  constructor: TransformStream,
+  point: function(x, y) { this.stream.point(x, y); },
+  sphere: function() { this.stream.sphere(); },
+  lineStart: function() { this.stream.lineStart(); },
+  lineEnd: function() { this.stream.lineEnd(); },
+  polygonStart: function() { this.stream.polygonStart(); },
+  polygonEnd: function() { this.stream.polygonEnd(); }
+};