old_contents: from landlab.plot.imshow import (imshow_grid, imshow_node_grid,
                                   imshow_cell_grid, imshow_grid_at_node)
  
new_contents: from landlab.plot.imshow import (imshow_grid, imshow_node_grid,
                                   imshow_cell_grid, imshow_grid_at_node)
  from landlab.plot.channel_profile import analyze_channel_network_and_plot
  
subject: add analyze_channel_network_and_plot to plot's __init__.py