<｜begin▁of▁sentence｜>### Instruction:
As a patent examiner, you often encounter situations where you need to assess the novelty and patentability of various inventions. Imagine you're reviewing a patent application for a new type of chemical process. Within the application, there's a detailed configuration specifying parameters such as temperature, pressure, and reactant concentrations.

Your task is to identify a specific parameter, let's say the temperature setting for a crucial reaction step, labeled 'name_of_item', and ensure it's properly handled within the configuration. You need to develop a method to effectively remove this parameter from the configuration and verify whether it has indeed been deleted or reverted to its default value.

In practical terms, this involves navigating through the configuration document, identifying the 'name_of_item' parameter, and implementing a procedure to either delete it entirely or reset it to its default value. Once this action is performed, you must carefully validate the configuration to confirm that the targeted parameter has been successfully altered or removed, ensuring the integrity and accuracy of the patent application assessment process.
### Response:
from igraph import Configuration

# Instantiate the Configuration object
cfg = Configuration.instance()

# Assume there is an item named 'name_of_item' in the configuration
cfg['name_of_item'] = 'value'  # Set the item with a value
print('Before deletion:', cfg['name_of_item'])

# Using __delitem__ to delete 'name_of_item' from the configuration
del cfg['name_of_item']

# Verifying that the item is deleted or reset to default (if default exists)
print('After deletion:', cfg.get('name_of_item', 'Item not found'))
<|EOT|>
