Function __wbindgen_destroy_closure 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn __wbindgen_destroy_closure(
    a: usize,
    b: usize,
)

Destroys an owned closure by reconstructing and dropping its Box<dyn Trait> representation from the raw pointer data (a, b).

Safety

(a, b) must be a valid pair previously produced by Box::into_raw on a Box<dyn FnOnce/FnMut/Fn> closure, or a must be zero (in which case this is a no-op).