I'm attempting to add llibrary to my mod, and I copied the snippet and put it in the build.gradle file. Aswell I had a libs folder and put the mod itself in their. This is my first time adding a dependency, and its not working. I used cmd prompt to build. I get this error - Build file 'C:\Users\Bryan\Desktop\Minecraft Modding\ancientcreatures\build.gradle' line: 8

• What went wrong:
  A problem occurred evaluating root project 'ancientcreatures'.

Could not find method deobfCompile() for arguments [net.ilexiconn:llibrary:1.7.19-1.12.2] on object of type org.gradle.api.internal.artifacts.dsl.dependencies.DefaultDependencyHandler.

I've tried a lot of different ways and none of them seem to work, this is the closest I've gotten to adding llibrary.