text: 
  export let payloadBuilders = [];
  export let metaBuilders = [];
  export let trackingBuilders = [];
  export let headerBuilders = [];
  
  export function addPayloadBuilder(builder) {
      payloadBuilders.push(builder);
  }
  
  export function addMetaBuilder(builder) {
      metaBuilders.push(builder);
  }
  
  export function addTrackingBuilder(builder) {
      trackingBuilders.push(builder);
  }
  
  export function addHeaderBuilder(builder) {
      headerBuilders.push(builder);
  }