A property name, a dot-separated set of property names or an array of property names
that represents a path to get an environment value.
An environment property name must be a sequence of ASCII characters that can contain letters a-zA-Z,
$, _, and digits 0-9, but may not start with a digit.
A property name, a dot-separated set of property names or an array of property names that represents a path to get an environment value.
An environment property name must be a sequence of ASCII characters that can contain letters
a-zA-Z,$,_, and digits0-9, but may not start with a digit.