CustomNPC-Plus-API/java/net/minecraft/block/state/IBlockState.java

package net.minecraft.block.state;

import com.google.common.collect.ImmutableMap;
import net.minecraft.block.Block;
import net.minecraft.block.properties.IProperty;

import java.util.Collection;

/**
 * This code is owned by Minecraft
 */

public interface IBlockState {
    Collection<IProperty> getPropertyNames();

    <T extends Comparable<T>> T getValue(IProperty<T> property);

    <T extends Comparable<T>, V extends T> IBlockState withProperty(IProperty<T> property, V value);

    <T extends Comparable<T>> IBlockState cycleProperty(IProperty<T> property);

    ImmutableMap<IProperty, Comparable> getProperties();

    Block getBlock();
}