class_docstr: Simple MCP subclass that allows the front to travel
  a certain distance from the seed point, and uses a constant
  cost factor that is independent of the cost array.
class_docstr_tok: ["Simple","MCP","subclass","that","allows","the","front","to","travel","a","certain","distance","from","the","seed","point",",","and","uses","a","constant","cost","factor","that","is","independent","of","the","cost","array","."]
code: def examine_neighbor(self, index, new_index, offset_length):
      pass
  
file_path: scikit-image/skimage/graph/tests/test_flexible.py
imports: import numpy
  import skimage.graph.mcp
  from skimage._shared.testing import assert_array_equal
label_desc: Use image node_id 4 for calling the FlexibleMCP obj's underlying member method code with example usage: obj.examine_neighbor(index, new_index, offset_length) without return types