returns the number of vertices . concode_field_sep int[][] vertexParents concode_elem_sep HashMap<VertexType,Integer> vertex2Index concode_elem_sep Object[] vertices concode_elem_sep int[][] vertexChildren concode_elem_sep int[][] vertexDescendants concode_elem_sep int[][] vertexAncestors concode_field_sep ArrayList<VertexType> getAncestors concode_elem_sep ArrayList<VertexType> getParents concode_elem_sep boolean isAncestor concode_elem_sep boolean isAncestor concode_elem_sep ArrayList<VertexType> getDescendants concode_elem_sep ArrayList<VertexType> getChildren concode_elem_sep boolean isDescendant concode_elem_sep boolean isDescendant concode_elem_sep int getVertexIndex concode_elem_sep int[] getVertexIndices concode_elem_sep int[] createIndicesFromIter concode_elem_sep boolean isVertexInGraph concode_elem_sep VertexType getVertex
int function ( ) { return this . vertices . length ; }