BaseEntity field name (e.g. 'SearchProviderID').
Column header label.
OptionalLookupFor 'lookup': which field of the lookup entity is displayed. Defaults to 'Name'.
OptionalLookupFor 'lookup': entity name whose rows populate the dropdown.
OptionalLookupFor 'lookup': optional ExtraFilter to constrain lookup rows.
OptionalOptionsFor 'select': fixed option list.
OptionalPlaceholderPlaceholder text for empty cells.
OptionalReadTrue to make the cell read-only.
Editor type.
OptionalWidthCSS width (e.g. '140px').
Declarative spec for a single grid column.