OptionalrowCount: numberOptionalmetadata: MWhether the section is currently expanded
OptionalmetadataOptional custom metadata for the section
OptionalrowOptional row count for related entity sections (populated after grid loads)
Unique key for the section (used for lookups and bindings)
Display name for the section
Information about a form section, including its expanded state and optional metadata. Generic type M allows subclasses to extend with custom metadata.