class_docstr: A strategy which produces dicts with a fixed set of keys, given a
  strategy for each of their equivalent values.
  
  e.g. {'foo' : some_int_strategy} would generate dicts with the single
  key 'foo' mapping to some integer.
class_docstr_tok: ["A","strategy","which","produces","dicts","with","a","fixed","set","of","keys",",","given","a","strategy","for","each","of","their","equivalent","values",".","e.g",".","{","'foo","'",":","some_int_strategy","}","would","generate","dicts","with","the","single","key","'foo","'","mapping","to","some","integer","."]
code: def __repr__(self):
      return "FixedAndOptionalKeysDictStrategy(%r, %r)" % (
          self.required,
          self.optional,
      )
  
imports: from __future__ import absolute_import, division, print_function
  from collections import OrderedDict
  import hypothesis.internal.conjecture.utils
  from hypothesis.errors import InvalidArgument
  from hypothesis.internal.conjecture.junkdrawer import LazySequenceCopy
  from hypothesis.internal.conjecture.utils import combine_labels
  from hypothesis.strategies._internal.strategies import MappedSearchStrategy, SearchStrategy, filter_not_satisfied
label_desc: Use image node_id 3 for calling the FixedAndOptionalKeysDictStrategy obj's underlying member method code with example usage: obj.__repr__() and returns: unknown