Added MODIFIER_KEYWORD_ONLY_ARGUMENT

cpg-language-python/src/main/kotlin/de/fraunhofer/aisec/cpg/frontends/python/PythonLanguage.kt

@@ -31,6 +31,7 @@ import de.fraunhofer.aisec.cpg.frontends.Language
 import de.fraunhofer.aisec.cpg.frontends.of
 import de.fraunhofer.aisec.cpg.graph.HasOverloadedOperation
 import de.fraunhofer.aisec.cpg.graph.autoType
+import de.fraunhofer.aisec.cpg.graph.declarations.ParameterDeclaration
 import de.fraunhofer.aisec.cpg.graph.scopes.Symbol
 import de.fraunhofer.aisec.cpg.graph.statements.expressions.BinaryOperator
 import de.fraunhofer.aisec.cpg.graph.statements.expressions.UnaryOperator
@@ -163,10 +164,16 @@ class PythonLanguage :
     companion object {
         /**
          * This is a "modifier" to differentiate parameters in functions that are "positional" only.
-         * This information will be stored in
-         * [de.fraunhofer.aisec.cpg.graph.declarations.ParameterDeclaration.modifiers] so that we
-         * can use is later in call resolving.
+         * This information will be stored in [ParameterDeclaration.modifiers] so that we can use is
+         * later in call resolving.
          */
         const val MODIFIER_POSITIONAL_ONLY_ARGUMENT = "posonlyarg"
+
+        /**
+         * This is a "modifier" to differentiate parameters in functions that are "keyword" only.
+         * This information will be stored in [ParameterDeclaration.modifiers] so that we can use is
+         * later in call resolving.
+         */
+        const val MODIFIER_KEYWORD_ONLY_ARGUMENT = "kwonlyarg"
     }
 }