constraint.NoCollide
  Entity constraint.NoCollide( Entity ent1,  Entity ent2,  number bone1,  number bone2,  boolean disableOnRemove = false )
Description
Creates an no-collide "constraint". Disables collision between two entities.
Does not work with players.
Arguments
5 boolean disableOnRemove = false
If set, the nocollide will be reversed if the constraint is removed.
Returns
1 Entity 
The created constraint. (logic_collision_pair) Will return 
false if the constraint could not be created.
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