create_from_commandline
Description:
public static AppInfo create_from_commandline (string commandline, string? application_name, AppInfoCreateFlags flags) throws Error
  
  Creates a new AppInfo from the given information.
Note that for commandline, the quoting rules of the Exec key of the 
      freedesktop.org Desktop Entry Specification are applied. For 
      example, if the commandline contains percent-encoded URIs, the percent-character must be doubled in order to prevent it from being 
      swallowed by Exec key unquoting. See the specification for exact quoting rules.
Parameters:
| commandline | the commandline to use | 
| application_name | the application name, or null to use  | 
| flags | flags that can specify details of the created AppInfo | 
Returns:
| new AppInfo for given command. |