Library dependencies
Some Libraries are dependent on other libraries. For example, most of the Adafruit Graphic Display libraries are dependent on the Adafruit GFX Library. You must have the GFX library installed to use the dependent libraries.
Some Libraries are dependent on other libraries. For example, most of the Adafruit Graphic Display libraries are dependent on the Adafruit GFX Library. You must have the GFX library installed to use the dependent libraries.