nRF52840 vector names when moving to SDK 2.7.0

I have some code that used to compile using version 2.5.2

I'm trying to move to 2.7.0 and have my own manager for TWIM that needs to intercept the TWIM interrupt.

In earlier versions, I used the statement:

IRQ_CONNECT(SPIM1_SPIS1_TWIM1_TWIS1_SPI1_TWI1_IRQn,5,nrfx_isr,nrfx_twim_1_irq_handler,0);
but the compiler complains that   nrfx_twim_1_irq_handler  isn't defined.   
Have the names in the vector table changed?    I searched the documentation but couldn't find any information on this.
Thanks!
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