@Override
	public Attachment findAttachment(ResourceId resourceId) {
		checkNotNull(resourceId,"Attached resource identifier cannot be null");
		return this.attachments.get(this.attachmentsByResourceId.get(resourceId));
	}
@Override
	public Attachment findAttachment(ResourceId resourceId) {
		checkNotNull(resourceId,"Attached resource identifier cannot be null");
		return this.attachments.get(this.attachmentsByResourceId.get(resourceId));
	}
@ Override public Attachment findAttachment ( ResourceId resourceId ) { checkNotNull ( resourceId , "Attached resource identifier cannot be null" ) ; return this . attachments . get ( this . attachmentsByResourceId . get ( resourceId ) ) ; }
{@inheritDoc}
{