Ash.Resource.Validation.Builtins.present
You're seeing just the function
present, go back to Ash.Resource.Validation.Builtins module for more information.
Validates the presence of a list of attributes
If no options are provided, validates that they are all present.
:at_least- At least this many must be present. Defaults to the number of attributes provided:at_most- At most this many must be present. Defaults to the number of attributes provided:exactly- Exactly this many must be present