Whether this wrapper still refers to a live engine object.
Number of fields.
Number of page/filter selections.
The 0-based source sheet index.
The output region's top row.
The output region's left column.
Reference equality is the identity test — prefer a === b. This is retained only for
the rare cross-realm case where two wrappers describe the same handle by value. Reads the
raw index so comparing a stale wrapper never throws.
A readable identity for logs and diagnostics, never [object Object].
The fieldIndex-th field, or null if out of range.
Recompute the pivot's output region against its source. Returns whether it recomputed.
A pivot table on a sheet, addressed by
(sheet, index). Built via Sheet.addPivotTable; this wrapper reads its model back and recomputes it. Reads round-trip through the engine.