def resolve(self, _):
if self.default_value == DUMMY_VALUE:<EOL><INDENT>if self.name in os.environ:<EOL><INDENT>return os.environ[self.name]<EOL><DEDENT>else:<EOL><INDENT>raise VelException(f"<STR_LIT>")<EOL><DEDENT><DEDENT>else:<EOL><INDENT>return os.environ.get(self.name, self.default_value)<EOL><DEDENT>
Resolve given variable