protected function validateMandatoryAttribs() {
			// Iterate over all fields
	    	foreach ( static::$mandatoryFields as $field ) {
	    		// If the field does not exist then exit with exception
	    		if ( !array_key_exists($field, $this->attributes) ) {
	    			throw new \SVGCreator\SVGException("The field " . $field . " does not exist for " . static::TYPE . ".", 1);
	    		}
	    	}
		}