anchor.diff:      + campaigns (optional, list, `Black Friday`) ... Comma-delimited list of campaigns to include
       + templates (optional, list, `summer-sale`) ... Comma-delimited list of template IDs to include
       + nodes (optional, list, `Email-MSys-1,Email-MSys-2,Email-MSys-3`) ... Comma-delimited list of nodes to include ( **Note:** SparkPost Elite only )
  -    + bindings (optional, list, `Confirmation`) ... Comma-delimited list of bindings to include ( **Note:** SparkPost Elite only )
  -    + binding_groups (optional, list, `Transaction`) ... Comma-delimited list of binding groups to include ( **Note:** SparkPost Elite only )
  +    + sending_ips (optional, list, `Confirmation`) ... Comma-delimited list of sending IPs to include
  +    + ip_pools (optional, list, `Transaction`) ... Comma-delimited list of IP pools to include
       + subaccounts (optional, list, `123,125,127`) ... Comma-delimited list of subaccount ids to include (**Note:** providing ?subaccounts=0 will filter out all subaccount data, and only return master account data)
       + protocols (optional, list, `smtp`) ... Comma-delimited list of protocols for filtering ( **Note:** SparkPost Elite only )
           + Values
  
positive.code:   [Engagement Details][]
  
  
  ## Deliveries By Attempt [/metrics/deliverability/attempt{?from,to,domains,campaigns,templates,nodes,bindings,binding_groups,subaccounts,protocols,timezone}]
  
  + Model
  
  
negative.code:   + campaigns (optional, list, `Black Friday`) ... Comma-delimited list of campaigns to include
    + templates (optional, list, `summer-sale`) ... Comma-delimited list of template IDs to include
    + nodes (optional, list, `Email-MSys-1,Email-MSys-2,Email-MSys-3`) ... Comma-delimited list of nodes to include ( **Note:** SparkPost Elite only )
    + sending_ips (optional, list, `Confirmation`) ... Comma-delimited list of sending IPs to include
    + ip_pools (optional, list, `Transaction`) ... Comma-delimited list of IP pools to include
    + subaccounts (optional, list, `123,125,127`) ... Comma-delimited list of subaccount ids to include (**Note:** providing ?subaccounts=0 will filter out all subaccount data, and only return master account data)
    + protocols (optional, list, `smtp`) ... Comma-delimited list of protocols for filtering ( **Note:** SparkPost Elite only )
        + Values
  