@Override
    public synchronized Cell get(final int row, final int column) {
        return cells[row][column];
    }
Lookup table for the circles of the pattern we are currently drawing.
This will be the cells of the complete pattern unless we are animating,
in which case we use this to hold the cells we are drawing for the in
progress animation.
android-patternview/src/main/java/com/eftimoff/patternview/cells/CellManager.java