color mapping
column description
either map or domain should be available
whether the column can be removed or not
frozen column
default group renderer to use
label of the column
whether to render the label as HTML (unsafe)
dump of mapping function
d3 format number Format
default renderer to use
the function to use, it has two parameters: children (current children) and values (their row values)
column summary line (subtitle)
whether to render the description as HTML (unsafe)
default summary renderer to use
the column type
is this column visible by default
initial width of the column
color of this column
not used anymore