Function addAttachment

addAttachment(feature, layer, attachment, options?): Promise<Attachment>
Adds an attachment to a feature.
Parameters
- feature: Feature
  The feature to which the attachment will be added.
- layer: AttachmentEnabledLayer
  The layer (or table) that the feature belongs to.
- attachment: AttachmentProperties | Attachment | File
  The file attachment.
- Optionaloptions: AddAttachmentOptions
  Optional options.
Returns Promise<Attachment>