Constant block_sys::BLOCK_FIELD_IS_OBJECT

pub const BLOCK_FIELD_IS_OBJECT: block_assign_dispose_flags = 3;

The value is of some id-like type, and should be copied as an Objective-C object: i.e. by sending -retain or via the GC assign functions in GC mode (not yet supported).

id, NSObject, attribute((NSObject)), block, …