accord-core/src/main/java/accord/utils/btree/BTreeRemoval.java [47:73]:
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            if (i >= 0)
            {
                if (BTree.isLeaf(node))
                    index = lb + i;
                else
                {
                    final int indexInNode = BTree.getSizeMap(node)[i];
                    index = lb + indexInNode - 1;
                    elemToSwap = BTree.findByIndex(node, indexInNode - 1);
                }
                break;
            }
            if (BTree.isLeaf(node))
                return btree;

            i = -1 - i;
            if (i > 0)
                lb += BTree.getSizeMap(node)[i - 1] + 1;

            node = (Object[]) node[keyEnd + i];
        }
        if (BTree.size(btree) == 1)
            return BTree.empty();
        Object[] result = removeFromLeaf(btree, index);
        if (elemToSwap != null)
            BTree.replaceInSitu(result, index, elemToSwap);
        return result;
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accord-core/src/main/java/accord/utils/btree/BTreeRemoval.java [92:118]:
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            if (i >= 0)
            {
                if (BTree.isLeaf(node))
                    index = lb + i;
                else
                {
                    final int indexInNode = BTree.getSizeMap(node)[i];
                    index = lb + indexInNode - 1;
                    elemToSwap = BTree.findByIndex(node, indexInNode - 1);
                }
                break;
            }
            if (BTree.isLeaf(node))
                return btree;

            i = -1 - i;
            if (i > 0)
                lb += BTree.getSizeMap(node)[i - 1] + 1;

            node = (Object[]) node[keyEnd + i];
        }
        if (BTree.size(btree) == 1)
            return BTree.empty();
        Object[] result = removeFromLeaf(btree, index);
        if (elemToSwap != null)
            BTree.replaceInSitu(result, index, elemToSwap);
        return result;
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