Source code:
@Grab(group='org.openscience.cdk', module='cdk-bundle', version='2.9')
import org.openscience.cdk.interfaces.*;
IBond.Stereo.each {
println it
}
Output:
NONE
UP
UP_INVERTED
DOWN
DOWN_INVERTED
UP_OR_DOWN
UP_OR_DOWN_INVERTED
E_OR_Z
E
Z
E_Z_BY_COORDINATES