Returns the previous container for the submission, if there is one.
File: src/db-objects/submissions/submission.php
Submission::get_element_values_data()
Gets all element values set for the submission.
Submission::add_error()
Adds an error to the submission.
Submission::remove_error()
Removes an error from the submission.
Submission::get_errors()
Gets all errors, for the entire submission or a specific element.
Submission::__set()
Magic setter.
Submission::get_form()
Returns the parent form for the submission.
Submission::get_submission_values()
Returns all submission values that belong to the submission.
Submission::sync_upstream()
Synchronizes the model with the database by storing the currently pending values.
Submission::sync_downstream()
Synchronizes the model with the database by fetching the currently stored values.