Function track_union_field_access 

pub fn track_union_field_access(
    union_name: &str,
    field_name: &str,
    location: &str,
)

Track union field access.

Records a UnionFieldAccess event. Use this when accessing a union field.

Arguments

• union_name - Name of the union
• field_name - Name of the field being accessed
• location - Source location