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The Environment Variable condition looks at the system environment variables that make up Keyboard Maestro Engine's environment and determines if the specified environment variable:
exists.
does not exist.
is empty.
is not empty.
exactly matches a specified string.
does not exactly matches a specified string.
contains (case insensitively) a specified string.
does not contain (case insensitively) a specified string.
matches a specified regular expression.
does not match a specified regular expression.