XDPXI's Documentation
Register

Blocks

import dev.xdpxi.xdlib.api.v7.Register;
import net.minecraft.block.AbstractBlock;
import net.minecraft.block.Block;
import net.minecraft.sound.BlockSoundGroup;

Adding a Custom Block

To make a custom item you add Register.registerBlock() to the Mod Initializer

test_block = Register.registerBlock(
                    Block::new,
                    AbstractBlock.Settings.create().sounds(BlockSoundGroup.STONE),
                    "test_block",
                    MOD_ID
             );