Performs the standard environment symbol searches given
name.
The search is performed using the same search mechanism used for environment
symbols or class names specified on ::CLASS directives.
If the name is not
found, .nil will be returned.
Note that the standard environment symbol search will return an
object instance (and not a class) when searching e. g. for "nil", "true",
"false", "endofline", "RexxInfo", or objects in the .LOCAL directory.