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@@ -2409,6 +2409,12 @@ page](Configuration.md) It has three methods:
- `has(varname)`: returns `true` if the specified variable is set
+- `keys()`*(since 0.57.0)*: returns an array of keys of
+ the configuration data object.
+
+ You can iterate over this array with the [`foreach`
+ statement](Syntax.md#foreach-statements).
+
- `merge_from(other)` *(since 0.42.0)*: takes as argument a different
configuration data object and copies all entries from that object to
the current.