message: Improve printer case for Flow ObjectTypeIndexer type.
diff: @@ -1717,15 +1717,26 @@ function genericPrintNoParens(path: any, options: any, print: any) {
  return path.call(print, "value");
  case "ObjectTypeIndexer":
  - return concat([
  - printVariance(path, print),
  - "[",
  + if (n.static) {
  + parts.push("static ");
  + }
  +
  + parts.push(printVariance(path, print), "[");
  +
  + if (n.id) {
  + parts.push(
  path.call(print, "id"),
  ": ",
  + );
  + }
  +
  + parts.push(
  path.call(print, "key"),
  "]: ",
  path.call(print, "value"),
  - ]);
  + );
  +
  + return concat(parts);
  case "ObjectTypeProperty":
  return concat([
  