POST /API/queryRuntimeAPI/getAttachmentValue attachmentInstance=…&options=…
AbstractRemoteQueryRuntimeAPI.getAttachmentValue({'attachmentInstance': /* attachmentInstance the attachment instance */, 'options': /* options the options map (domain, queyList, user) */});
Gets the content of an attachment instance as a byte array. This method is the only way to retrieve an attachment content from an attachment instance.