Alignment properties.
Border properties.
Fill properties for the background
Font properties.
The name of the namedStyle that is being referenced. For named styles this is null or ignored. If this is not specified then all unspecified fields will inherit from the normal style
Format used for
Additional we allow for aliases to be set.
Protection properties.
A boolean value indicating whether the text string in a cell should be prefixed by a single quote mark (e.g., 'text). In these cases, the quote is not stored in the Shared Strings Part.
Optional
sizeOnly applied with type is
1?
ICellStyle is an immutable object but values can be set via various updaters using the CellStyleValues.