Index: node_modules/postcss/lib/result.js
===================================================================
--- node_modules/postcss/lib/result.js	(revision 2058e5c694bb6097866a5fe6503c519e8f74970f)
+++ node_modules/postcss/lib/result.js	(revision 2058e5c694bb6097866a5fe6503c519e8f74970f)
@@ -0,0 +1,42 @@
+'use strict'
+
+let Warning = require('./warning')
+
+class Result {
+  get content() {
+    return this.css
+  }
+
+  constructor(processor, root, opts) {
+    this.processor = processor
+    this.messages = []
+    this.root = root
+    this.opts = opts
+    this.css = ''
+    this.map = undefined
+  }
+
+  toString() {
+    return this.css
+  }
+
+  warn(text, opts = {}) {
+    if (!opts.plugin) {
+      if (this.lastPlugin && this.lastPlugin.postcssPlugin) {
+        opts.plugin = this.lastPlugin.postcssPlugin
+      }
+    }
+
+    let warning = new Warning(text, opts)
+    this.messages.push(warning)
+
+    return warning
+  }
+
+  warnings() {
+    return this.messages.filter(i => i.type === 'warning')
+  }
+}
+
+module.exports = Result
+Result.default = Result