where to add the new element relative to the cursor,
one of after", "before", "on".
header
display header if TRUE
alignment
columns alignement, argument length must match with columns length,
values must be "l" (left), "r" (right) or "c" (center).
first_row
Specifies that the first column conditional formatting should be
applied. Details for this and other conditional formatting options can be found
at http://officeopenxml.com/WPtblLook.php.
first_column
Specifies that the first column conditional formatting should
be applied.
last_row
Specifies that the first column conditional formatting should be applied.
last_column
Specifies that the first column conditional formatting should be
applied.
no_hband
Specifies that the first column conditional formatting should be applied.
no_vband
Specifies that the first column conditional formatting should be applied.