message: Deprecated the use of constraint= and .constraint with ResourceVariable
diff: @@ -47,6 +47,7 @@ from tensorflow.python.ops.gen_resource_variable_ops import *
  from tensorflow.python.training.tracking import base as trackable
  from tensorflow.python.util import compat
  from tensorflow.python.util.deprecation import deprecated
  +from tensorflow.python.util.deprecation import deprecated_args
  def get_resource_handle_data(graph_op):
  @@ -316,6 +317,10 @@ def variable_accessed(variable):
  class BaseResourceVariable(variables.VariableV1):
  """A python variable from an existing handle."""
  + @deprecated_args(
  + None,
  + "If using Keras pass *_constraint arguments to layers.",
  + "constraint")
  def __init__( # pylint: disable=super-init-not-called
  self,
  trainable=None,
  @@ -535,6 +540,9 @@ class BaseResourceVariable(variables.VariableV1):
  return self._initial_value
  @property
  + @deprecated(
  + None,
  + "Apply a constraint manually following the optimizer update step.")
  def constraint(self):
  """Returns the constraint function associated with this variable.
  