Parser Relation without include object

[AshrafHefny]

Description

This will allow parsing relation without include object, like in the delete, assign case.

How has this been tested?

Run the tests to make sure everything works fine.

Types of changes

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• [ x ] Bug fix (non-breaking change which fixes an issue)
• [ x ] New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

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[JaZo]

Closing as duplicate of #23