"Your model name is not a valid java name" when trying to import mob model.

For a mod I am making I am trying to import a .java model of an iron golem into MCreator 2020.2 for 1.12.2, but when I try to do this I am given this error:

Here is the code for the model, any idea where the problem is coming from?

package myfirstmodmodel;

import com.google.common.collect.ImmutableList;
import com.mojang.blaze3d.matrix.MatrixStack;
import com.mojang.blaze3d.vertex.IVertexBuilder;
import net.minecraft.client.renderer.entity.model.EntityModel;
import net.minecraft.client.renderer.model.ModelRenderer;
import net.minecraft.entity.Entity;
import net.minecraftforge.api.distmarker.Dist;
import net.minecraftforge.api.distmarker.OnlyIn;

@OnlyIn(Dist.CLIENT)
public class irongolemmodel<T extends Entity> extends EntityModel<T> {
    public ModelRenderer field_78176_b;
    public ModelRenderer field_78174_d;
    public ModelRenderer field_78177_c;
    public ModelRenderer field_78175_e;
    public ModelRenderer field_78178_a;
    public ModelRenderer field_78173_f;

    public irongolemmodel() {
        this.textureWidth = 128;
        this.textureHeight = 128;
        this.field_78174_d = new ModelRenderer(this, 60, 58);
        this.field_78174_d.setRotationPoint(0.0F, -7.0F, 0.0F);
        this.field_78174_d.addBox(9.0F, -2.5F, -3.0F, 4.0F, 30.0F, 6.0F, 0.0F, 0.0F, 0.0F);
        this.field_78178_a = new ModelRenderer(this, 0, 0);
        this.field_78178_a.setRotationPoint(0.0F, -7.0F, -2.0F);
        this.field_78178_a.addBox(-4.0F, -12.0F, -5.5F, 8.0F, 10.0F, 8.0F, 0.0F, 0.0F, 0.0F);
        this.field_78178_a.setTextureOffset(24, 0).addBox(-1.0F, -5.0F, -7.5F, 2.0F, 4.0F, 2.0F, 0.0F, 0.0F, 0.0F);
        this.field_78176_b = new ModelRenderer(this, 0, 40);
        this.field_78176_b.setRotationPoint(0.0F, -7.0F, 0.0F);
        this.field_78176_b.addBox(-9.0F, -2.0F, -6.0F, 18.0F, 12.0F, 11.0F, 0.0F, 0.0F, 0.0F);
        this.field_78176_b.setTextureOffset(0, 30).addBox(-4.5F, 10.0F, -3.0F, 9.0F, 5.0F, 6.0F, 0.5F, 0.5F, 0.5F);
        this.field_78175_e = new ModelRenderer(this, 37, 0);
        this.field_78175_e.setRotationPoint(-4.0F, 11.0F, 0.0F);
        this.field_78175_e.addBox(-3.5F, -3.0F, -3.0F, 6.0F, 16.0F, 5.0F, 0.0F, 0.0F, 0.0F);
        this.field_78177_c = new ModelRenderer(this, 60, 21);
        this.field_78177_c.setRotationPoint(0.0F, -7.0F, 0.0F);
        this.field_78177_c.addBox(-13.0F, -2.5F, -3.0F, 4.0F, 30.0F, 6.0F, 0.0F, 0.0F, 0.0F);
        this.field_78173_f = new ModelRenderer(this, 60, 0);
        this.field_78173_f.mirror = true;
        this.field_78173_f.setRotationPoint(5.0F, 11.0F, 0.0F);
        this.field_78173_f.addBox(-3.5F, -3.0F, -3.0F, 6.0F, 16.0F, 5.0F, 0.0F, 0.0F, 0.0F);
    }

    @Override
    public void render(MatrixStack matrixStackIn, IVertexBuilder bufferIn, int packedLightIn, int packedOverlayIn, float red, float green, float blue, float alpha) { 
        ImmutableList.of(this.field_78174_d, this.field_78178_a, this.field_78176_b, this.field_78175_e, this.field_78177_c, this.field_78173_f).forEach((modelRenderer) -> { 
            modelRenderer.render(matrixStackIn, bufferIn, packedLightIn, packedOverlayIn, red, green, blue, alpha);
        });
    }

    @Override
    public void setRotationAngles(T entityIn, float limbSwing, float limbSwingAmount, float ageInTicks, float netHeadYaw, float headPitch) {}

    
    public void setRotateAngle(ModelRenderer modelRenderer, float x, float y, float z) {
        modelRenderer.rotateAngleX = x;
        modelRenderer.rotateAngleY = y;
        modelRenderer.rotateAngleZ = z;
    }
}