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Checking if an instance's class implements an interface?
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Added some dots to actually "feel" see the difference.
Generated by this: https://3v4l.org/8Cog7
Conclusion
In case you have an object to check, use instance of like mentioned in the accepted answer.
In case you have a class to check, use is_a.
Bonus
Given the case you want to instantiate a class b...
How to ignore all hidden directories/files recursively in a git repository?
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How to get last items of a list in Python?
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IIS AppPoolIdentity and file system write access permissions
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MySQL foreign key constraints, cascade delete
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What do the crossed style properties in Google Chrome devtools mean?
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what's the meaning of '=?' in angularJS directive isolate scope declaration?
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What does the line “#!/bin/sh” mean in a UNIX shell script?
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jQuery - If element has class do this
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Convert columns to string in Pandas
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