Table.getGrid

Gets the logical layout of the table as a rectangular grid of cells. It considers rowspan and colspan. A cell with a large span is represented in the grid by being referenced several times. The tablePortition parameter can get just a <thead>, <tbody>, or <tfoot> portion if you pass one.

Note: the rectangular grid might include null cells.

This is kinda expensive so you should call once when you want the grid, then do lookups on the returned array.

class Table
getGrid
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