Fix issues identified by Psalm

Author: sebastianbergmann

.psalm/baseline.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<files psalm-version="3.11.4@58e1d8e68e5098bf4fbfdfb420c38d563f882549">
+<files psalm-version="3.11.5@3c60609c218d4d4b3b257728b8089094e5c6c6c2">
   <file src="src/CodeCoverage.php">
     <ArgumentTypeCoercion occurrences="2">
       <code>$unit[0]</code>
@@ -27,15 +27,6 @@
     <PossiblyNullPropertyAssignmentValue occurrences="1">
       <code>$parent</code>
     </PossiblyNullPropertyAssignmentValue>
-    <TypeDoesNotContainNull occurrences="1">
-      <code>$this-&gt;parent-&gt;getPath() === null</code>
-    </TypeDoesNotContainNull>
-    <TypeDoesNotContainType occurrences="1">
-      <code>$this-&gt;parent-&gt;getPath() === false</code>
-    </TypeDoesNotContainType>
-    <UndefinedMethod occurrences="1">
-      <code>getMethods</code>
-    </UndefinedMethod>
   </file>
   <file src="src/Node/Builder.php">
     <EmptyArrayAccess occurrences="1">

src/Node/AbstractNode.php

@@ -80,7 +80,7 @@ public function id(): string
     public function pathAsString(): string
     {
         if ($this->path === null) {
-            if ($this->parent === null || $this->parent->pathAsString() === null || $this->parent->pathAsString() === false) {
+            if ($this->parent === null) {
                 $this->path = $this->name;
             } else {
                 $this->path = $this->parent->pathAsString() . \DIRECTORY_SEPARATOR . $this->name;