com.twosigma.beakerx.kernel.Kernel.showNullExecutionResult
true
com.twosigma.beakerx.kernel.Kernel.showNullExecutionResult = true;
String seeNullString = null;
seeNullString
null
com.twosigma.beakerx.kernel.Kernel.showNullExecutionResult = false;
String noNullString = null;
noNullString
null