Get a string value from the componnet.

        Arguments:
        key - the key to retrieve
        raw - Control whether the value is interpolated or returned raw.  By
              default, values are interpolated.
        fallback - The return value if key isn't in the component.

def get(self, key, raw=False, fallback=None):
        """
        Get a string value from the componnet.

        Arguments:
        key - the key to retrieve
        raw - Control whether the value is interpolated or returned raw.  By
              default, values are interpolated.
        fallback - The return value if key isn't in the component.
        """
        return self._component.get(key, raw=raw, fallback=fallback)