| check_presence | Check for the presence of an element | 
| failure | Set the status to FAILURE | 
| isDefined | Check if an element is defined | 
| isTrueVal | Check if an element contains a TRUE value | 
| mdq_get | Get the file path for an object | 
| runCheck | Execute a quality check for a metadata document | 
| runSuite | Execute a quality suite for a metadata document | 
| save_output | Save an object as an output | 
| set_status | Set the status in a check | 
| success | Set the status to SUCCESS | 
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