The togglerowexpansion method of the table of element UI expands the specified row

First of all:
The ToggleRowExpansion method in the document, I used it without success.
Another approach was tried, along with the expansion table of the original document. Two main points were noted:
1. Set table properties:

 
2. Processing data:

Brief summary:
Both row-key and expand-row-keys need to be used together for this to work!


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