pub unsafe extern "C" fn igraph_attribute_record_init_copy(
to: *mut igraph_attribute_record_t,
from: *const igraph_attribute_record_t,
) -> igraph_error_tpub unsafe extern "C" fn igraph_attribute_record_init_copy(
to: *mut igraph_attribute_record_t,
from: *const igraph_attribute_record_t,
) -> igraph_error_t