Adds a settings field for specifying whether the element is required to be filled in.
Adds a settings field for specifying additional CSS classes for the input.
Sanitizes the settings sections.
Sanitizes the settings fields.
Filter Hook: Filters the two strings to use for choice export columns indicating whether the choice was included in the submission or not.
Checks whether a single export column should be used for all choices.
Filter Hook: Filters whether to only render a single column for all choices when exporting submissions.
Escapes a single value for a specific export format.
Creates a new error object.
Gets the slug for a submission value edit field.