group_elt formats a group_elt in this fashion: (Scalar_mult.group_elt AAAAAA==). If the storage value is not Sodium.Scalar_mult.group_elt_size bytes long, it will be formatted as (Scalar_mult.group_elt <size mismatch>).
integer formats a integer in this fashion: (Scalar_mult.integer AAAAAA==). If the storage value is not Sodium.Scalar_mult.integer_size bytes long, it will be formatted as (Scalar_mult.integer <size mismatch>).