system/Database/BaseBuilder.php
public function where($key, $value = null, bool $escape = null)
	{
		return $this->whereHaving('QBWhere', $key, $value, 'AND ', $escape);
	}
public function where($key, $value = null, bool $escape = null)
	{
		return $this->whereHaving('QBWhere', $key, $value, 'AND ', $escape);
	}
WHERE

Generates the WHERE portion of the query.
Separates multiple calls with 'AND'.

@param mixed   $key
@param mixed   $value
@param boolean $escape

@return BaseBuilder