class SimpleForm::FormBuilder

def find_input(attribute_name, options = {}, &block)
  column     = find_attribute_column(attribute_name)
  input_type = default_input_type(attribute_name, column, options)
  if block_given?
    SimpleForm::Inputs::BlockInput.new(self, attribute_name, column, input_type, options, &block)
  else
    find_mapping(input_type).new(self, attribute_name, column, input_type, options)
  end
end