This code is taken from react-table row selection example. https://react-table.tanstack.com/docs/examples/row-selection

What is the purpose of the indeterminate argument in this function?

const IndeterminateCheckbox = React.forwardRef(
  ({ indeterminate, ...rest }, ref) => {
    const defaultRef = React.useRef()
    const resolvedRef = ref || defaultRef

    React.useEffect(() => {
      resolvedRef.current.indeterminate = indeterminate
    }, [resolvedRef, indeterminate])
    console.log(resolvedRef)
    console.log(indeterminate)
    return (
      <>
        <input type="checkbox" ref={resolvedRef} {...rest} />
      </>
    )
  }
)