setChildValue method
Replaces the text content of the first child element named name.
Only works for a child that already has text content (e.g. one made
with addChildValue); returns false otherwise, or if there is no
such child.
Implementation
bool setChildValue(String name, String value) =>
_withUtf8(
name,
(n) => _withUtf8(value, (v) => lsl_set_child_value(xmlPtr, n, v)),
) !=
0;