How to create multiple indexes on the same column of a table?

Starting from oracle 12c, it is possible to create multiple indexes on the same column of a table. However, the index types should not be the same. For instance, one index can be B-tree index and the other one BITMAP index. In addition to that, the two indexes created for the same column should not be both visible at the same time.

Example:

SQL>  CREATE INDEX imp_index on employees (emp_first_name);

SQL> CREATE BITMAP INDEX imp_bitindex on employees (emp_first_name)  INVISIBLE;