hazard/writers:
hazard/writers:

Added missing docstrings to `SourceModelXMLWriter`.

g-weatherill/oq-risklib,gem/oq-engine,raoanirudh/oq-risklib,raoanirudh/oq-risklib,gem/oq-engine,vup1120/oq-risklib,vup1120/oq-risklib,gem/oq-engine,g-weatherill/oq-risklib,gem/oq-engine,g-weatherill/oq-risklib,gem/oq-engine