code: def normalize_fields(data, fields)
        fields.each do |field|
          field_name = field[:name]
          if data.include?(field_name)
            field_data = data[field_name]
            field_data = normalize_output_field(field_data, field)
            field_data = check_array_collapse(field_data, field)
            data[field_name] = field_data unless field_data.nil?
          end
        end
        return data
      end
docs: Normalizes all fields for the given data based on the fields list
   provided.