function mergeContextArrays(aTarget, aSource, iStartIndex) {
		for (let i = 0; i < aSource.length; i++) {
			aTarget[iStartIndex + i] = aSource[i];
		}

		aTarget.bExpectMore ||= aSource.bExpectMore;
	}
Requests all contexts from the binding which are required to display the data in the current viewport.

@param {int} [iRequestLength]
    The amount of contexts to request.
    The default is the row count computed by the row mode, see {@link sap.ui.table.rowmodes.RowMode#getComputedRowCounts}.
    The minimum request length is determined by the row mode, see {@link sap.ui.table.rowmodes.RowMode#getMinRequestLength}.
@returns {sap.ui.model.Context[]} Array of row contexts.
@private