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chain input to load data from multiple sources into the watch
execution context when the watch is triggered. The inputs in a chain
are processed in order and the data loaded by an input can be accessed by the
subsequent inputs in the chain.
chain input enables you perform actions based on data from multiple
sources. You can also use the data collected by one input to load data
from another source.
For example, the following chain input loads data from an HTTP server using the
path set by a
The inputs in a chain are specified as an array to guarantee the order in which the inputs are processed. (JSON does not guarantee the order of arbitrary objects.)