anchor.diff:  |--------------------|:-:       |---------------------------------------|-------------|------------------|
   |type |string |The MIME type of the image.  E.g. "image/jpeg".  The value will apply "as-is" to the "Content-Type" header of the generated MIME part for the image. | yes |  |
   |name |string |The name of the inline image, which will be inserted into the Content-ID header. The image should be referenced in your HTML content using \<img src="cid:THIS_NAME"\>. The name must be unique within the content.inline_images array. | yes | Maximum length - 255 bytes |
  -|data |string | The content of the image as a Base64 encoded string.  The string should not contain \r\n line breaks.  The SparkPost systems will add line breaks as necessary to ensure the Base64 encoded lines contain no more than 76 characters each. | yes | The entirety of transmission content (text + html + attachments + inline images) is limited to 10 MBs |
  +|data |string | The content of the image as a Base64 encoded string.  The string should not contain \r\n line breaks.  The SparkPost systems will add line breaks as necessary to ensure the Base64 encoded lines contain no more than 76 characters each. | yes | The entirety of transmission content (text + html + attachments + inline images) is limited to 20 MBs |
   
   ### Using a Stored Template
   
  
positive.code: | Field         | Type     | Description                           | Required   | Notes   |
  |------------------------|:-:       |---------------------------------------|-------------|--------|
  |id    |string  |Short, unique, alphanumeric ID used to reference the template   | At a minimum, id or name is required upon creation.  It is auto generated if not provided. |After a template has been created, this property cannot be changed.  Maximum length - 64 bytes   |
  |content              |JSON  |Content that will be used to construct a message  |  yes  |  For a full description, see the Content Attributes. Maximum length - 10 MBs  |
  |published |boolean |Whether the template is published or is a draft version|no - defaults to false|A template cannot be changed from published to draft.|
  |name |string  |Editable display name  | At a minimum, id or name is required upon creation.   |The name does not have to be unique.  Maximum length - 1024 bytes   |
  |description |string  |Detailed description of the template  |no    | Maximum length - 1024 bytes |
  
negative.code: |--------------------|:-:       |---------------------------------------|-------------|------------------|
  |type |string |The MIME type of the attachment. E.g. "text/plain", " image/jpeg", "audio/mp3", "video/mp4", "application/msword", "application/pdf", etc, including the "charset" parameter if needed, e.g. '"text/html; charset="UTF-8"' The value will apply "as-is" to the "Content-Type" header of the generated MIME part for the attachment. | yes |  |
  |name |string |The filename of the attachment (for example, "document.pdf"). This is inserted into the filename parameter of the Content-Disposition header. | yes | Maximum length - 255 bytes |
  |data |string |The content of the attachment as a Base64 encoded string.  The string should not contain \r\n line breaks.  The SparkPost systems will add line breaks as necessary to ensure the Base64 encoded lines contain no more than 76 characters each. | yes | The entirety of transmission content (text + html + attachments + inline images) is limited to 20 MBs |
  
  ### Inline Image Attributes
  
  