getBuffer still exists;

api/init.lua

@@ -12817,7 +12817,8 @@ return {
           key = "Buffer",
           module = "lovr.graphics",
           constructors = {
-            "lovr.graphics.newBuffer"
+            "lovr.graphics.newBuffer",
+            "lovr.graphics.getBuffer"
           },
           methods = {
             {

api/lovr/graphics/Buffer/init.lua

@@ -46,6 +46,7 @@ return {
     buffer with offsets (or multiple buffers).
   ]],
   constructors = {
-    'lovr.graphics.newBuffer'
+    'lovr.graphics.newBuffer',
+    'lovr.graphics.getBuffer'
   }
 }