Attachment constructor
Attachment({})
Implementation
Attachment({
this.authorIcon,
this.authorLink,
this.authorName,
this.color,
this.fallback,
this.fields,
this.footer,
this.footerIcon,
this.imageUrl,
this.pretext,
this.text,
this.thumbUrl,
this.title,
this.titleLink,
this.ts,
});