The constructor expects 3 mandatory parameters.

• column : The column identifier

• row : The row number (ie the relative position)

• content : A CellType or a Proc returning a CellType

column and row define the precise location of the aggregated value in the Summary table. Row numbers need not be contiguous; what's important is that they allow results to be displayed in the desired row order.

Example of content directly fed by a literal string:

Tablo::Summary::BodyRow.new("Price", 40, "Tax (20%)")
Tablo::Summary::BodyRow.new("Price", 60, "Balance due")

Example of content fed by a proc returning a CellType value:

Tablo::Summary::BodyRow.new(:total, 40, -> { Tablo::Summary.use(:tax) })
Tablo::Summary::BodyRow.new(:total, 60, -> { Tablo::Summary.use(:total_due) })

Important: Note here the use of the Summary.use class method, which retrieves, via a Symbol key, an aggregated value previously calculated in a Summary::UserProc instance.