The IN_CALLSTACK_TABLE type is a table type that is based on the IN_CALLSTACK record type. It is used to define variables to store the call stack for each of the IN_CONTEXT namespace identifiers. It is used by the various call stack related procedures including IN_CALLSTACK_EXTEND, IN_CALLSTACK_TRIM, IN_CALLSTACK_GET_HIST, IN_CALLSTACK_PRINT.
TYPE IN_CALLSTACK_TABLE IS TABLE OF IN_CALLSTACK INDEX BY PLS_INTEGER;