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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _create_solr_query(self, line):
 """Actual search - easier to test. """

        p0 = ""
        if line:
            p0 = line.strip()
        p1 = self._query_string_to_solr_filter(line)
        p2 = self._object_format_to_solr_filter(line)
        p3 = self._time_span_to_solr_filter()
        result = p0 + p1 + p2 + p3
        return result.strip()