hint(mirror, self, data) {
    if (!this.completion[IMPORT_NAME] || this.completion.hasOtherImports) {
      this.completeText(mirror, this.completion.text);
    } else {
      this.addImport(mirror);
    }
  }
Render own styles when autocomplete displays.

@param mirror - codemirror instance
@param self
@param data