Resolve "Consider using the `genpdf` crate for generating PDF documents from analysis reports."

Closes #73 (closed)

src/nodes/source.rs

@@ -121,7 +121,11 @@ impl Optical for Source {
         if name != "inverted" {
             self.props.set(name, prop)
         } else {
-            let inverted = self.props.get_bool("inverted").unwrap().unwrap();
+            let inverted = if let Proptype::Bool(inverted) = prop {
+                inverted
+            } else {
+                false
+            };
             if inverted {
                 Err(OpossumError::Properties(
                     "Cannot change the inversion status of a source node!".into(),
@@ -160,6 +164,7 @@ mod test {
     #[test]
     fn not_invertable() {
         let mut node = Source::default();
+        assert!(node.set_property("inverted", false.into()).is_ok());
         assert!(node.set_property("inverted", true.into()).is_err());
     }
     #[test]