code: def is_fullfilled_by(self, other):
          
          # allow the other index to be equally large only. It being larger is an option
          # but it creates a problem with scenarios of the kind PRIMARY KEY(foo,bar) UNIQUE(foo)
          if len(other.get_columns()) != len(self.get_columns()):
              return False
  
          # Check if columns are the same, and even in the same order
          if not self.spans_columns(other.get_columns()):
              return False
  
          if not self.same_partial_index(other):
              return False
  
          if self.is_simple_index():
              # this is a special case: If the current key is neither primary or unique,
              # any unique or primary key will always have the same effect
              # for the index and there cannot be any constraint overlaps.
              # This means a primary or unique index can always fulfill
              # the requirements of just an index that has no constraints.
              return True
  
          if other.is_primary() != self.is_primary():
              return False
  
          if other.is_unique() != self.is_unique():
              return False
  
          return True
docs: Checks if the other index already fulfills
          all the indexing and constraint needs of the current one.
  
          :param other: The other index
          :type other: Index
  
          :rtype: bool