Within our library, we have a class called QueryPlanEntry.. This class models the data found in a BigQuery Job (called ExplainQueryStage). The description of the BigQuery data can be found here. When we compare the fields, we are finding that there is an important one missing.
In ExplainQueryStage we have a field called "slotMs" which I take to be the slot milliseconds consumed by the given stage. When we look at the corresponding Python QueryPlanEntry, we do not find that field exposed as a property.
This issue asks for consideration for adding that property.
A quick examination makes me feel that the change might be made here.