` Safe-InferredsetEnv name value, sets the specified environment variable to value. If value< is the empty string, the specified environment variable is  removed from the environment. Throws  if name is the empty string or  contains an equals character.  unSet name5 removes the specified environment variable from the % environment of the current process. Throws  if name is the empty string or  contains an equals character.  setenv-0.1.0 System.SetEnvControl.Exception IOExceptionsetEnvunsetEnvsetEnv_