Readonly hiddenReadonly isisCustomFormat is a special flag that allows for rows to have normal style and not be cleared.
Readonly isNote - size can be a function of autoFitting isCustomSize means the field has set by the user and should not be autoSize due to autoFitting (unless explicitly done so by a user gesture)
Readonly sizeThe size in pixels
Readonly styleThe style for the header. Note - This is actually not reflected in the header but rather in all of the cells in this header. For example setting font to bold will bold all of the cell within this span but not the header itself.
Takes an update and returns 3 possible choices.
Returns true if the headers are logically equal
Flag to indicate if column is hidden. Note - A column with a size > 0 but hidden is true is valid because when hiding a value we don't change the size so that an unhide will restore to it's previous location