presto-parser/src/main/java/io/prestosql/sql/parser/AstBuilder.java/AstBuilder/visitCall
class AstBuilder:    @Override
    public Node visitCall(SqlBaseParser.CallContext context)
    {
        return new Call(
                getLocation(context),
                getQualifiedName(context.qualifiedName()),
                visit(context.callArgument(), CallArgument.class));
    }