Builds a step's parameters from its input mapping.
A missing or unparseable mapping yields no parameters and an error, never a throw — a step with a malformed mapping should fail with a legible reason, not take the dispatcher down.
Builds a step's parameters from its input mapping.
A missing or unparseable mapping yields no parameters and an error, never a throw — a step with a malformed mapping should fail with a legible reason, not take the dispatcher down.