code: function (fieldDefinition, fieldName) {
  		const severity = propertyHelper.getSeverity(fieldDefinition, undefined, 'mandatory');
  		const isMandatoy = propertyHelper.getProperty(fieldDefinition, undefined, 'mandatory');
  
  		// const severity = fieldDefinition.severity;
  		// const isMandatoy = fieldDefinition.mandatory;
  
  		if (isMandatoy === true) {
  			/**
  			 * Just check if for mandatory fields the value is given
  			 * @param content the content hash to be validated.
  			 */
  			return function (content) {
  				// get the value from the content hash
  				const valueToCheck = content[fieldName];
  
  				// If the value is defined, we need to check it
  				if (valueToCheck === undefined || valueToCheck === null) {
  					return {
  						errorCode: 'MANDATORY_VALUE_MISSING',
  						severity: severity,
  						fieldName: fieldName
  					};
  				}
  			};
  
  		}
  	}
docs: Creates the checks which are common to each file type
  @param fieldDefinition The field_definition for this field.
  @param fieldName The name of the current field