The functions described here are packaged in the System module. The module is included with the Mule runtime, but you must import it to your DataWeave code by adding the line
import dw::System to your header.
1 2 3 4 %dw 2.0 import dw::System --- System::envVar("SYS_PSWD")
This module contains functions that allow you to interact with the underlying system.