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Linker error: undefined reference to 'nrfx_twim_xfer'

Hello, how can I use the functions in nrfx_twim.c

Using SES and the CMSIS config wizard, I have picked:

NRFX_TWIM_ENABLED 1

NRFX_TWIM0_ENABLED 1

NRFX_TWIS_ENABLED 0

NRFX_TWI_ENABLED 0

TWIS_ENABLED 0

TWI_ENABLED 0

In the IDE, the source for nrfx_twim.c is all 'greyed out'.