Cannot find <LiquidCrystal_SoftI2C.h> library for 1602 LCD

Projects Programming
7

yes , but it doesn't work...
for example, it doesn't have class LiquidCrystal_SoftI2C, so i changed name as LiquidCrystal_I2C! and i changed other things' name
But another problem occured. like this

      : : [SCLIN] "I" (SCL_IN), [SCLPIN] "I" (SCL_PIN));
                       ^~~~~~

so...I'm not sure if the library is right

thank you