fn add_custom_migrations(
default: impl IntoIterator<Item = Migration>,
custom: impl IntoIterator<Item = Migration>,
) -> impl Iterator<Item = Migration>Expand description
Add custom migrations to a default migration sequence.
Migrations in custom replace migrations in default with the same version. Otherwise, the two
sequences default and custom are merged so that the resulting sequence is sorted by
ascending version number. Each of default and custom is assumed to be the output of
validate_migrations; that is, each is sorted by version and contains no duplicate versions.