input:                             from typing import List
  
  
  def has_close_elements(numbers: List[float], threshold: float) -> bool:
      """ Check if in given list of numbers, are any two numbers closer to each other than
      given threshold.
      >>> has_close_elements([1.0, 2.0, 3.0], 0.5)
      False
      >>> has_close_elements([1.0, 2.8, 3.0, 4.0, 5.0, 2.0], 0.3)
      True
      """
  
                              def fibonacci(n: int) -> int:
                                  """ Computes the nth Fibonacci number.
                                  >>> fibonacci(0)
                                  0
                                  >>> fibonacci(1)
                                  1
                                  >>> fibonacci(9)
                                  34
                                  """
                                  a = 0
                                  b = 1
                                  if n < 0:
                                      raise ValueError("Input should be a non-negative integer.")
                                  elif n == 0:
                                      return a
                                  elif n == 1:
                                      return b
                                  else:
                                      for _ in range(2, n + 1):
                                          c = a + b
                                          a = b
                                          b = c
                                      return b
output:     for i in range(len(numbers)):
          for j in range(i + 1, len(numbers)):
              if abs(numbers[i] - numbers[j]) < threshold:
                  return True
      return False