Reorder vector-element methods to a consistent order
diff --git a/src/cxx_vector.rs b/src/cxx_vector.rs
index 3742fa4..829e12a 100644
--- a/src/cxx_vector.rs
+++ b/src/cxx_vector.rs
@@ -77,8 +77,8 @@
 // codebase.
 #[doc(hidden)]
 pub unsafe trait VectorElement: Sized {
-    unsafe fn __get_unchecked(v: &CxxVector<Self>, pos: usize) -> &Self;
     fn __vector_size(v: &CxxVector<Self>) -> usize;
+    unsafe fn __get_unchecked(v: &CxxVector<Self>, pos: usize) -> &Self;
     fn __push_back(v: &CxxVector<Self>, item: &Self);
 }