import * as React from 'react';
import { Chip, Grid, StyleRulesCallback, withStyles } from '@material-ui/core';
import { DragSource, DragSourceSpec, DragSourceCollector, ConnectDragSource, DropTarget, DropTargetSpec, DropTargetCollector, ConnectDropTarget } from 'react-dnd';
import * as React from 'react';
import { Chip, Grid, StyleRulesCallback, withStyles } from '@material-ui/core';
import { DragSource, DragSourceSpec, DragSourceCollector, ConnectDragSource, DropTarget, DropTargetSpec, DropTargetCollector, ConnectDropTarget } from 'react-dnd';