code: function(tank_id, provision_id, type, fields) {
  		return request({
  			hostname: hosts.wotb,
  			path: '/wotb/encyclopedia/provisions/'
  		}, {
  			tank_id: tank_id ? tank_id.toString() : '',
  			provision_id: provision_id ? provision_id.toString() : '',
  			type: type,
  			fields: fields ? fields.toString() : ''
  		});
  	}
docs: Available equipment and provisions.
  
  @param {number|number[]} [tank_id] select provisions for the given tank(s)
  @param {number|number[]} [provision_id] item id
  @param {string} [type] provision type, value "optionalDevice" or "equipment"
  @param {string|string[]} [fields] response selection
  @returns {Promise<Object>} resolves to description of each provision