backendNodeId property
A speculation rule set is either added through an inline
<script> tag or through an external resource via the
'Speculation-Rules' HTTP header. For the first case, we include
the BackendNodeId of the relevant <script> tag. For the second
case, we include the external URL where the rule set was loaded
from, and also RequestId if Network domain is enabled.
See also:
Implementation
final dom.BackendNodeId? backendNodeId;