This is a developer level documentation and support is not provided for customizations. You can learn about action and filter hooks here. If you are not sure what to do, consider hiring a developer.

easy_booking_product_is_bookable
easy_booking_product_minimum_booking_duration
easy_booking_product_maximum_booking_duration
easy_booking_product_first_available_date
easy_booking_product_booking_duration
easy_booking_product_number_of_dates_to_select

Filter wceb-product-functions.php

easy_booking_product_booked_dates
easy_booking_product_stock_left_for_dates

Pro Filter wcebpro-product-functions.php

easy_booking_disabled_dates

Pro Filter class-wcebpro-assets.php

easy_booking_get_bookings
easy_booking_booked_products

Pro Filter wcebpro-availability-functions.php

easy_booking_after_product_stock_init

Pro Action wcebpro-availability-functions.php

easy_booking_after_update_product_stock_data

Pro Action class-wcebpro-admin-order.php, class-wcebpro-checkout.php