lib/Yucca/Component/SchemaManager.php
public function fetchOne($tableName, array $identifier, $shardingKey = null, $forceFromMaster = true)
    {
        return $this->fetch($tableName, $identifier, $shardingKey, array('*'), false, $forceFromMaster);
    }
public function fetchOne($tableName, array $identifier, $shardingKey = null, $forceFromMaster = true)
    {
        return $this->fetch($tableName, $identifier, $shardingKey, array('*'), false, $forceFromMaster);
    }
Fetch one entry from database

@param string $tableName
@param array  $identifier
@param null   $shardingKey
@param bool   $forceFromMaster

@return mixed
@throws \Exception