Method is_borrowed

crates/vm/src/object/core.rs:1914–1916

(&self)

    /// Whether this is a borrowed (non-owning) reference.
    #[inline(always)]
    pub fn is_borrowed(&self) -> bool {
        self.bits.get() & STACKREF_BORROW_TAG != 0
    }

    /// Get a `&PyObject` reference.  Works for both owned and borrowed.
    #[inline(always)]