Ruby on Rails bulk import

https://github.com/bodrovis-learning/RailsSeriesYT/blob/lesson_11/app/services/user_bulk_service.rb line 15 and 26

def callZip::File.open(@archive) do |zip_file|  zip_file.glob('*.xlsx').each do |entry|    User.import users_from(entry), ignore: true  endend

:

def users_from(entry)    sheet = RubyXL::Parser.parse_buffer(entry.get_input_stream.read)[0]    sheet.map do |row|      cells = row.cells[0..2].map { |c| c&.value.to_s }      User.new name: cells[0],               email: cells[1],               password: cells[2],               password_confirmation: cells[2]    end

How does users_from return array for User.import while it return user in loop? There no yield function. It s logical that it will return only one last element