Make Get operations only serialize the bare minimum.

service/datastore/pls_test.go

Index: service/datastore/pls_test.go
diff --git a/service/datastore/pls_test.go b/service/datastore/pls_test.go
index ad7e1e71d87cd290e17e8247e116717b91abb52b..3ec9867f9d91e750d41bd2d4d1e56b139d1559ca 100644
--- a/service/datastore/pls_test.go
+++ b/service/datastore/pls_test.go
@@ -375,6 +375,7 @@ func (d *Doubler) Save(withMeta bool) (PropertyMap, error) {
 	return propMap, nil
 }
 
+func (d *Doubler) GetAllMeta() PropertyMap                               { return nil }
 func (d *Doubler) GetMeta(string) (interface{}, error)                   { return nil, ErrMetaFieldUnset }
 func (d *Doubler) GetMetaDefault(_ string, dflt interface{}) interface{} { return dflt }
 func (d *Doubler) SetMeta(string, interface{}) error                     { return ErrMetaFieldUnset }
@@ -403,6 +404,7 @@ func (d *Deriver) Save(withMeta bool) (PropertyMap, error) {
 	}, nil
 }
 
+func (d *Deriver) GetAllMeta() PropertyMap                               { return nil }
 func (d *Deriver) GetMeta(string) (interface{}, error)                   { return nil, ErrMetaFieldUnset }
 func (d *Deriver) GetMetaDefault(_ string, dflt interface{}) interface{} { return dflt }
 func (d *Deriver) SetMeta(string, interface{}) error                     { return ErrMetaFieldUnset }