Gets a specific filter, by key.

@param   string  $key
@return  mixed|null
971365
public function getFilter($key)
    {
        if (!isset($this->filters[$key])) {
            return null;
        }
        return $this->filters[$key];
    }
376063
public function offsetGet( $key )
    {
        $key = strtolower( $key );
        if ( !array_key_exists( $key, $this->lookup ) )
        {
            return null;
        }
        return $this->map[$this->lookup[$key]];
    }
1267218
public function getWhere($key)
    {
        foreach( $this->where as $w ) {
            if( $w[0] === $key ) {
                return $w[1];
            }
        }
        return null;
    }
673775
public function getKey($key)
	{
		return isset($this->data[$key]) ? $this->data[$key] : null;
	}
294321
public function get($key)
    {
        if (isset($this->_values[$key])) {
            return $this->_values[$key];
        }

        return null;
    }
148206
public function getIssueByKey($key)
    {
        if (array_key_exists($key, $this->issues) && isset($this->issues[$key])) {
            return $this->issues[$key];
        }

        return null;
    }
626427
public function get($key = 'aliases')
    {
        return collect($this->getManifest())->flatMap(function ($configuration) use ($key) {
            return (array) ($configuration[$key] ?? []);
        })->filter()->all();
    }
1073655
public function get(string $key)
    {
        if ($this->enabled === false) {
            return null;
        }

        $index = $this->cacheIndex[$key] ?? $key;
        if (!isset($this->cache[$index]) || $this->cacheExpiryTime[$index] < microtime(true)) {
            return null;
        }

        ++$this->cacheAccessCount[$index];

        return $this->cache[$index];
    }
938884
function filter($key=NULL,$func=NULL) {
        if (!$key)
            return array_keys($this->filter);
        if (!$func)
            return $this->filter[$key];
        $this->filter[$key]=$func;
    }
862497
protected function fetchKey($key)
    {
        if (str_contains($key, '.'))
        {
            $keys = explode('.', $key);
            $search = array_except($keys, 0);

            return array(array_get($keys, 0), implode('.', $search));
        }

        return array($key, null);
    }
1207279
public function findByKey(string $key) {
        if (!$this->root) {
            return null;
        }

        return $this->root->findByKey($key);
    }
492425
public function filterValue($key)
    {
        $this->parseInputOnce();
        return isset($this->filters[$key]) ? $this->filters[$key] : null;
    }
1094684
public static function get($key)
    {
        return isset(self::$config[$key]) ? self::$config[$key] : null;
    }
969519
public function get($key)
	{
		if ( ! isset($this->strings[$key]))
		{
			return null;
		}

		return $this->strings[$key];
	}
838674
public function getQueryParam($key)
    {
        if (isset($this->queryParams[$key])) {
            return $this->queryParams[$key];
        }
        return null;
    }
996204
public function getParameter($key) {
		if (array_key_exists ( $key, $this->parameters ))
			return $this->parameters [$key];
		else
			return null;
	}
80125
public function get($key)
    {
        $setting = $this->getSettingOrFail($key);

        $value = $this->backend->getSetting($key);

        return  is_null($value) ? $setting->default() : $value;
    }