hunk.code_window:   vendorChunk?: boolean;
     commonChunk?: boolean;
     baseHref?: string;
     progress?: boolean;
     poll?: number;
   }
   export class DevServerBuilder implements Builder<DevServerBuilderOptions> {
  
hunk.labels: keep keep keep keep add keep keep keep keep
hunk.after_edit:   verbose?: boolean;
  
hunk.file_path: packages/angular_devkit/build_angular/src/dev-server/index.ts
hunk.type: add
file: {
    "$schema": "http://json-schema.org/schema",
    "id": "PostUpdateSchema",
    "type": "object",
    "properties": {
      "package": {
        "description": "The package to migrate.",
        "type": "string"
      },
      "collection": {
        "description": "The collection to load the migrations from.",
        "type": "string"
      },
      "from": {
        "description": "The version installed previously.",
        "type": "string"
      },
      "to": {
        "description": "The version to migrate to.",
        "type": "string"
      }
    },
    "required": ["package", "collection", "from", "to"]
  }
  