For example:
<img width="1904" alt="Screen Shot 2021-11-05 at 11 59 05 AM" src="https://user-images.githubusercontent.com/29597/140540816-25d6d47b-7aea-4121-aeaa-565accc65b1f.png">

sendRequestTimestamp: Milliseconds,
  url: string,
|};
export type ReactComponentMeasureType =
  | 'render'
  | 'layout-effect-mount'
  | 'layout-effect-unmount'
  | 'passive-effect-mount'
  | 'passive-effect-unmount';
export type ReactComponentMeasure = {|
  +componentName: string,
  duration: Milliseconds,
  +timestamp: Milliseconds,
  +type: ReactComponentMeasureType,
  warning: string | null,
|};
/**
 * A flamechart stack frame belonging to a stack trace.
 */
export type FlamechartStackFrame = {|
  name: string,
  timestamp: Milliseconds,
  duration: Milliseconds,
  scriptUrl?: string,
  locationLine?: number,
  locationColumn?: number,
|};
export type UserTimingMark = {|
  name: string,
  timestamp: Milliseconds,