@Override
    public <T> T accept(ExpressionVisitor<T> visitor) {
        return visitor.visitLibraryFunction(DEFINITION, getArguments());
    }
Creates a {@link AwsPartition} function from the given expressions.

@param arg1 the region to retrieve partition information from.
@return The resulting {@link AwsPartition} function.
smithy-aws-endpoints/src/main/java/software/amazon/smithy/rulesengine/aws/language/functions/AwsPartition.java