class Arel::Collectors::Composite

def <<(str)
  left << str
  right << str
  self
end

def add_bind(bind, &block)
  left.add_bind bind, &block
  right.add_bind bind, &block
  self
end

def add_binds(binds, proc_for_binds = nil, &block)
  left.add_binds(binds, proc_for_binds, &block)
  right.add_binds(binds, proc_for_binds, &block)
  self
end

def initialize(left, right)
  @left = left
  @right = right
end

def retryable=(retryable)
  left.retryable = retryable
  right.retryable = retryable
  @retryable = retryable
end

def value
  [left.value, right.value]
end