code: function (soajs, combo, cb) {
  		checkForMongo(soajs);
  		mongo.findOne(combo.collection, combo.condition || {}, combo.fields || null, combo.options || null, cb);
  	}
docs: Find one entry based on a condition
  @param {SOAJS Object} soajs
  @param {Object} combo
  @param {Callback Function} cb