REPEATABLEVALUES($repeatable_field, 'cost')

// returns [1,2,3]

REPEATABLEVALUES($repeatable_field, 'choice_value').map(CHOICEVALUE)

// used for returning values from a single choice field within a repeatable section
// returns ["widget","spinner","gizmo"]

FLATTEN(REPEATABLEVALUES($repeatable_field, 'choice_value').map(CHOICEVALUES))

// used for returning values from a multiple choice field within a repeatable section
// returns ["widget","spinner","gizmo"]

REPEATABLEVALUES($repeatable_field, ['child_repeatable', 'grandchild_repeatable', 'field_inside_nested_rep'])

//used for returning values from fields that are within nested repeatable sections.
// repeatable_field - Top level repeatable section
// child_repeatable - 1st nested repeatable section
// grandchild_repeatable - 2nd nested repeatable section
// field_inside_nested_rep - field within the 2nd nested repeatable section

// returns ["widget","spinner","gizmo"]