how to get explain plan from pl/sql function call?

consider this working pl/sql block: declare o_result boolean; io_error varchar2(30000); tab1 someTable1; tab2 someTable2; begin tab1(1).col1 := 'str'; tab1(1).col2 := 1; tab2(1).col1 := 'str'; tab2(1).col2 := 0.5; tab2(1).col3 := 6; o_result := some_function(io_error, 2,'str', 5, to_date('01-JAN-23','DD-MON-YY'), to_date('31-DEC-23','DD-MON-YY'), 4, 'A', tab1, tab2, 'str', 'B', 'str'); end; how to get the explain plan for pl/sql function calls where its inputs are dates and custom types?