I have a procedure defined by others that I am trying to call in sqldeveloper run window.

The run declaration is as follows
--------------------------------------------------------------
DECLARE
PV_USR_ID VARCHAR2(200);
PV_COL_T_ENV_DETAILS MYAPP.COL_T_ENV_DETAILS;
BEGIN
PV_USR_ID := '****';
-- Modify the code to initialize the variable
-- PV_COL_T_ENV_DETAILS := NULL;

MYAPP_PKG.INS_APP_ENV_DETAILS_AIP(
PV_USR_ID => PV_USR_ID,
PV_COL_T_ENV_DETAILS => PV_COL_T_ENV_DETAILS
);
--rollback;
END;
----------------------------------------------------------------

PV_COL_T_ENV_DETAILS is defined as

create or replace TYPE col_t_env_details IS TABLE OF VARCHAR2 (10) ;
----------------------------------------------------------------

I am not certain of the syntax for initializing this variable such that sqlDeveloper will run it.

PV_COL_T_ENV_DETAILS MYAPP.COL_T_ENV_DETAILS := 
    MYAPP.COL_T_ENV_DETAILS('x1','x2','x3');