is mentioned by

Thm* i:enum1(). i = enum1_el1  i = enum1_el2  i = enum1_el3	[enum1_cases]
Def enum1_switch(value;el1;el2;el3) Def == Switch(value) Def == Case enum1_el1 => el1 Def == Case enum1_el2 => el2 Def == Case enum1_el3 => el3 Def == EndSwitch	[enum1_switch]

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