Get the additional information.

@param string $informationName The name of the information to retrieve.

@return mixed || null
184969
public function get($informationName)
    {
        if (isset($this->arrData[$informationName])) {
            return $this->arrData[$informationName];
        }

        return null;
    }
1138440
public function getInfo($name = "")
    {
        list($class, $action) = explode("::", $name);
        $action_doc = $this->doc->getInfo($class, $action);
        if($action_doc)
        {
            $return = $this->doc->formatReturn($action_doc);
            $action_doc['header'] = isset($action_doc['header']) ? array_merge($this->doc->__get('public_header'), $action_doc['header']) : [];
            $action_doc['param'] = isset($action_doc['param']) ? array_merge($this->doc->__get('public_param'), $action_doc['param']) : [];
            return $this->show('info', ['doc'=>$action_doc, 'return'=>$return]);
        }
    }
1185287
public function getParameter($paramName) {
		if(isset($this->params[$paramName])) {
					return $this->params[$paramName];
		}
		return null;
	}
212713
public function getRest($name = null)
    {
        if (is_null($name)) {
            return $this->rest;
        }

        return isset($this->rest[$name]) ? $this->rest[$name] : null;
    }
931846
public static function getFromName($messageName)
    {
        if (false === $message = MessageQuery::create()->filterByName($messageName)->findOne()) {
            throw new \Exception("Failed to load message $messageName.");
        }

        return $message;
    }
327630
public function getSourceByName($sourceName)
    {
        if (isset($this->sources[$sourceName])) {
            return $this->sources[$sourceName];
        }
        return null;
    }
557573
public function get($name) {
        return isset($this->metadata[$name]) ? $this->metadata[$name] : null;
    }
908052
def get_extra_info(self, name: str, default: Any=None) -> Any:
        """"""
        conn = self._response.connection
        if conn is None:
            return default
        transport = conn.transport
        if transport is None:
            return default
        return transport.get_extra_info(name, default)
1291285
public function getExtraOptionsHandler($extraOptionName)
    {
        // Check extraOption handlers that are valid for all classes
        if (isset(self::$extraOptionHandlers['*'][$extraOptionName])) {
            return self::$extraOptionHandlers['*'][$extraOptionName];
        }

        // Check extraOption handlers that are valid for the given class
        if (isset(self::$extraOptionHandlers[$this->class][$extraOptionName])) {
            return self::$extraOptionHandlers[$this->class][$extraOptionName];
        }

        return null;
    }
684242
public function getParameter(string $parameterName)
    {
        if (!$this->hasParameter($parameterName)) {
            return null;
        }

        return $this->storage->offsetGet($parameterName);
    }
846661
public function getSource($sourceName = null) {
		if ($sourceName === 'default') {
			$sourceName = null;
		}

		foreach ($this->sources as $key => $item) {
			if ((!$sourceName || $sourceName === $key)) {
				return $item;
			}

			$source = $item !== $this ? $item->getSource($sourceName) : null;

			if ($source) {
				return $source;
			}
		}

		if ($sourceName) {
			return null;
		}

		return $this;
	}
1060616
protected function findRelationByName($relationName)
    {
        foreach ($this->relations as $relation) {
            if ($relation->name() == $relationName || $relation->entity() == $relationName) {
                return $relation;
            }
        }

        return null;
    }
866441
public function getInfo($key)
    {
        if (!array_key_exists($key, $this->infos)) {
            throw new CurlException('Information ' . $key . ' not found in CurlRequest');
        }

        return $this->infos[$key];
    }
326284
public function getDataItem($itemname)
    {
        if (isset($this->data[$itemname])) {
            return $this->data[$itemname];
        }

        return null;
    }
575762
public function getHeader(string $headerName)
	{
		return $this->hasHeader($headerName) ? $this->headers[ $headerName ] : null;
	}
1010924
public function extension($filename)
    {
        if ($this->exists($filename)) {
            return pathinfo($this->path($filename), PATHINFO_EXTENSION);
        }

        return null;
    }
38204
public function getInfo($info_name) {
        $value = null;
        if($info_name == 'provider')
            $value = $this->provider;
        else if(property_exists($this->profile, $info_name))
            $value = $this->profile->$info_name;
        return $value;
    }