Sets summary recording on or off per the provided boolean value.
The provided value can be a python boolean, a scalar boolean Tensor, or
or a callable providing such a value; if a callable is passed it will be
invoked on-demand to determine whether summary writing will occur. Note that
when calling record_if() in an eager mode context, if you intend to provide a
varying condition like
step % 100 == 0, you must wrap this in a
callable to avoid immediate eager evaluation of the condition. In particular,
using a callable is the only way to have your condition evaluated as part of
the traced body of an @tf.function that is invoked from within the
can be True, False, a bool Tensor, or a callable providing such.
Returns a context manager that sets this value on enter and restores the
previous value on exit.