to
Parse this string as OSM opening hours according to the specification.
Note that the specification also covers defining points in time (used in for example for the tag key collection_times). You can check whether a parsed OpeningHours contains points in time via OpeningHours.containsTimePoints
Return
parsed opening hours or null if this cannot be parsed as opening hours
Parameters
lenient
Whether to accept certain unambiguous syntax variations that are not documented in the specification as valid