Creates an iterator over the selected connections type which yields
all the defined connections of that type.
Parameters
----------
connections: `PipelineTaskConnections`
An instance of a `PipelineTaskConnections` object that will be iterated
over.
connectionType: `str`
The type of connections to iterate over, valid values are inputs,
outputs, prerequisiteInputs, initInputs, initOutputs.
Yields
-------
connection: `BaseConnection`
A connection defined on the input connections object of the type
supplied. The yielded value Will be an derived type of
`BaseConnection`.
Definition at line 494 of file connections.py.