class Dry::Initializer::Builders::Attribute

def coercion_line
  return unless @type
  arity = @type.is_a?(Proc) ? @type.arity : @type.method(:call).arity
  if arity.equal?(1) || arity.negative?
    "#{@val} = #{@item}.type.call(#{@val}) unless #{@null} == #{@val}"
  else
    "#{@val} = #{@item}.type.call(#{@val}, self) unless #{@null} == #{@val}"
  end
end