code: def _extract_accessor_pairs(members):
      
      accessor_pairs = {}
  
      for name, member in members.items():
          if not (len(name) > _PROPERTY_ACCESSOR_PREFIX_LEN \
                          and _is_java_method(member)):
              continue
          access, rest = ( name[:_PROPERTY_ACCESSOR_PREFIX_LEN],
                           name[_PROPERTY_ACCESSOR_PREFIX_LEN:] )
          property_name = rest[:1].lower() + rest[1:]
          if property_name in members:
              if _is_java_method(members[property_name]):
                  continue
          if access == 'get' and member.isBeanAccessor():
              try:
                  pair = accessor_pairs[property_name]
                  pair[0] = member
              except KeyError:
                  accessor_pairs[property_name] = [member, None]
          elif access == 'set' and member.isBeanMutator():
              try:
                  pair = accessor_pairs[property_name]
                  pair[1] = member
              except KeyError:
                  accessor_pairs[property_name] = [None, member]
      return accessor_pairs
docs: Extract pairs of corresponding property access methods
      (getter and setter) from a Java class's members (attributes).
  
      If a public method with a property's name exists no pair for
      that property will be extracted.
  
      Returns a dictionary with the property name as key and a tuple
      of (getter method, setter method) as value. A tuple element
      value might be `None` if only a getter or only a setter
      exists.