docs: public HtmlPolicyBuilder allowStyling(CssSchema whitelist) {
      invalidateCompiledState();
  
      this.stylingPolicySchema =
          this.stylingPolicySchema == null
          ? whitelist
          : CssSchema.union(stylingPolicySchema, whitelist);
  
      // Allow the style attribute, and then we will fix it up later.  This allows
      // us to attach the final URL policy to the style attribute policy, while
      // still not allowing styles when allowStyling is followed by a call to
      // disallowAttributesGlobally("style").
      this.allowAttributesGlobally(
          AttributePolicy.IDENTITY_ATTRIBUTE_POLICY, ImmutableList.of("style"));
  
      return this;
    }