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Update ref by adding value to it.

This operation outputs "ref" after the update is done. This makes it easier to chain operations that need to use the reset value. Unlike tf.math.add, this op does not broadcast. ref and value must have the same shape.

ref A mutable Tensor. Must be one of the following types: float32, float64, int64, int32, uint8, uint16, int16, int8, complex64, complex128, qint8, quint8, qint32, half. Should be from a Variable node.
value A Tensor. Must have the same shape and dtype as ref. The value to be added to the variable.
use_locking An optional bool. Defaults to False. If True, the addition will be protected by a lock; otherwise the behavior is undefined, but may exhibit less contention.
name A name for the operation (optional).

Same as "ref". Returned as a convenience for operations that want to use the new value after the variable has been updated.