UnityEditorInternal.AnimationKeyTime.ContainsTime C# (CSharp) Method

        public bool ContainsTime(float time)
        {
            return ((time >= this.frameFloor) && (time < this.frameCeiling));
        }
    }

 public void RemoveKeyframe(AnimationKeyTime time)
 {
     for (int i = this.m_Keyframes.Count - 1; i >= 0; i--)
     {
         if (time.ContainsTime(this.m_Keyframes[i].time))
         {
             this.m_Keyframes.RemoveAt(i);
         }
     }
 }