Prism::RestParameterNode#repeated_parameter?

repeated_parameter?

# File tmp/rubies/ruby-3.4.1/lib/prism/node.rb, line 15897
def repeated_parameter?
  flags.anybits?(ParameterFlags::REPEATED_PARAMETER)
end

def repeated_parameter?: () -> bool

See also #operator_loc #save_name_loc #operator #save_operator_loc also in 4.0