getRawCapacitance function is undefined

[PopovsSergejs]

The function which is declared in the header is not implemented in .cpp file. Here is Arduino IDE report

" libraries\ProtoCentral_FDC1004_Capacitive_Sensor_Library\Protocental_FDC1004.cpp.o: In function FDC1004::getCapacitance(unsigned char)': C:\Users\sergejsp\Documents\Arduino\libraries\ProtoCentral_FDC1004_Capacitive_Sensor_Library\src/Protocental_FDC1004.cpp:137: undefined reference to FDC1004::getRawCapacitance(unsigned char, fdc1004_measurement_t*)'
collect2.exe: error: ld returned 1 exit status
exit status 1 "

This function is used in getCapacitance(); function.