Class that defines group of spheres for the excluded volume.
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          | __init__(self,
        entry_id,
        x_vol) Marker initializer.
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          | addSphere(self,
        radius,
        x,
        y,
        z) Adds spehere to excluded volume group.
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    |  | 
        
          | show(self) Show all spheres for this excluded volume.
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    |  | 
        
          | hide(self) Hide all spheres for this excluded volume.
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    |  | 
        
          | clear(self) Deletes all spheres for this excluded volume
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    | Inherited from object:__delattr__,__format__,__getattribute__,__hash__,__new__,__reduce__,__reduce_ex__,__repr__,__setattr__,__sizeof__,__str__,__subclasshook__ |