Added missing documentation
Added missing documentation


Former-commit-id: b29886803a78abe93a476e04b1f4af69b4daa762 [formerly 37fdd710883968ca1a1eda16b96a68a792ca07c1]
Former-commit-id: 025283cc7102f3fdba9255bb829ea76f4c45e845
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine