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signature on a web editor gives you the declaration section of logic. This allows you to manage the value and types of parameters of your logic in JavaScript.
var flow = flow.loadFlow(flowXml, flowHelper);
var signature = flow.signature;
// and now you have access to signature of the logic
// ...use properties and methods descried in API section...
API
Properties
<pre class="wp-block-syntaxhighlighter-code">// Returns input parameters
inputs
// Returns <a href="/knowledge-base/define-and-manage-parameters/" target="_blank">output parameters</a>
outputs
// Returns input-output parameters
inputOutputs</pre>
Methods
// Adds input parameters
addInputs(names)
// Adds output parameters
addOutputs(names)
// Adds input-output parameters
addInputOutputs(names)