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EClass LayoutItem (abstract)
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The generic layout item definition.

:ePackage: :doc:`LayoutDefinition <./EPackage_LayoutDefinition>`
:inherited by: :doc:`Edge <./EClass_LayoutDefinition_Edge>`, :doc:`Vertex <./EClass_LayoutDefinition_Vertex>`
:contained by: :doc:`Layout <./EClass_LayoutDefinition_Layout>`

EAttributes
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This eClass contains no attributes.

EReferences
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**parent** (:doc:`Vertex <./EClass_LayoutDefinition_Vertex>`) (lowerBound=0, upperBound=1) 
     A reference to its parent vertex. Used for nested graph objects. 

**refersTo** (EObject) (lowerBound=0, upperBound=1) 
     A reference to the eObject this layout item represents.