class RuboCop::Cop::Style::SymbolProc

def offense(node, method_name, block_method_name)
  block_start = node.loc.begin.begin_pos
  block_end = node.loc.end.end_pos
  range = range_between(block_start, block_end)
  add_offense(node,
              range,
              format(MSG,
                     method_name,
                     block_method_name))
end