code: def _properties_from_dict(d, key_name='key'):
      '''
      Transforms dictionary into pipeline object properties.
  
      The output format conforms to boto's specification.
  
      Example input:
          {
              'a': '1',
              'b': {
                  'ref': '2'
              },
          }
  
      Example output:
          [
              {
                  'key': 'a',
                  'stringValue': '1',
              },
              {
                  'key': 'b',
                  'refValue': '2',
              },
          ]
      '''
      fields = []
      for key, value in six.iteritems(d):
          if isinstance(value, dict):
              fields.append({
                  key_name: key,
                  'refValue': value['ref'],
              })
          else:
              fields.append({
                  key_name: key,
                  'stringValue': value,
              })
      return fieldf _properties_from_dict(d, key_name='key'):
      '''
      Transforms dictionary into pipeline object properties.
  
      The output format conforms to boto's specification.
  
      Example input:
          {
              'a': '1',
              'b': {
                  'ref': '2'
              },
          }
  
      Example output:
          [
              {
                  'key': 'a',
                  'stringValue': '1',
              },
              {
                  'key': 'b',
                  'refValue': '2',
              },
          ]
      '''
      fields = []
      for key, value in six.iteritems(d):
          if isinstance(value, dict):
              fields.append({
                  key_name: key,
                  'refValue': value['ref'],
              })
          else:
              fields.append({
                  key_name: key,
                  'stringValue': value,
              })
      return fields
docs: Transforms dictionary into pipeline object properties.
  
      The output format conforms to boto's specification.
  
      Example input:
          {
              'a': '1',
              'b': {
                  'ref': '2'
              },
          }
  
      Example output:
          [
              {
                  'key': 'a',
                  'stringValue': '1',
              },
              {
                  'key': 'b',
                  'refValue': '2',
              },
          ]