Function list_walk 

pub unsafe fn list_walk(
    l: *mut List,
    walker: Option<xmlListWalker>,
    data: *mut c_void,
)

Walk the list, calling the walker function for each element.

UPSTREAM-PARITY

void xmlListWalk(xmlListPtr l, xmlListWalker walker, void *data);

SAFETY

• l must be a valid pointer to a List, or NULL.
• walker must be a valid function pointer or NULL.