Support for macros in adf builder

Hello team
Is there any support in adf builder to display macros?
However upon seeing one of the old adf templates in atlassian codebase i see

<@heading header='Timeline' level=4/>,
{
  "type": "paragraph",
  "content": [
    {
      "type":"inlineExtension",
      "attrs":{
        "extensionType":"com.atlassian.confluence.macro.core",
        "extensionKey":"${extensionKey}",
        "text":" | incidentId = ${postmortem.incidentId}",
        "parameters":{
           "macroParams":{
              "incidentId":{
                 "value":"${postmortem.incidentId}"
              }
           },
           "macroMetadata":{
              "schemaVersion":{
                 "value":"1"
              }
           }
        }
      }
    }
  ]
}

,
which is used to render a macro
I however don’t see api documentation in Document builder