changed samplers property from array to IEnumerable

com.unity.perception/Runtime/Randomization/Parameters/CategoricalParameter.cs

         float[] m_NormalizedProbabilities;
 
         /// <summary>
-        /// Returns a list containing the samplers attached to this parameter
+        /// Returns an IEnumerable that iterates over each sampler field in this parameter
-        public override ISampler[] samplers => new [] { m_Sampler };
+        public override IEnumerable<ISampler> samplers
+        {
+            get { yield return m_Sampler; }
+        }
 
         /// <summary>
         /// The sample type generated by this parameter

com.unity.perception/Runtime/Randomization/Parameters/Parameter.cs

 using System;
+using System.Collections.Generic;
 using UnityEngine;
 using UnityEngine.Perception.Randomization.Samplers;
 
         public abstract Type sampleType { get; }
 
         /// <summary>
-        /// An array containing a reference to each sampler field in this parameter
+        /// Returns an IEnumerable that iterates over each sampler field in this parameter
-        public abstract ISampler[] samplers { get; }
+        public abstract IEnumerable<ISampler> samplers { get; }
 
         /// <summary>
         /// Constructs a new parameter

com.unity.perception/Runtime/Randomization/Parameters/ParameterTypes/BooleanParameter.cs

 using System;
+using System.Collections.Generic;
 using Unity.Burst;
 using Unity.Collections;
 using Unity.Jobs;
         [HideInInspector, SerializeReference] public ISampler value = new UniformSampler(0f, 1f);
 
         /// <summary>
-        /// Returns the sampler employed by this parameter
+        /// Returns an IEnumerable that iterates over each sampler field in this parameter
-        public override ISampler[] samplers => new[] { value };
+        public override IEnumerable<ISampler> samplers
+        {
+            get { yield return value; }
+        }
 
         static bool Sample(float t) => t >= 0.5f;
 

com.unity.perception/Runtime/Randomization/Parameters/ParameterTypes/ColorHsvaParameter.cs

 using System;
+using System.Collections.Generic;
 using Unity.Burst;
 using Unity.Collections;
 using Unity.Jobs;
         [SerializeReference] public ISampler alpha = new ConstantSampler(1f);
 
         /// <summary>
-        /// Returns the samplers employed by this parameter
+        /// Returns an IEnumerable that iterates over each sampler field in this parameter
-        public override ISampler[] samplers => new []{ hue, saturation, value, alpha };
+        public override IEnumerable<ISampler> samplers
+        {
+            get
+            {
+                yield return hue;
+                yield return saturation;
+                yield return value;
+                yield return alpha;
+            }
+        }
 
         /// <summary>
         /// Generates a color sample

com.unity.perception/Runtime/Randomization/Parameters/ParameterTypes/FloatParameter.cs

 using System;
+using System.Collections.Generic;
 using Unity.Collections;
 using Unity.Jobs;
 using UnityEngine.Perception.Randomization.Samplers;
         [SerializeReference] public ISampler value = new UniformSampler(0f, 1f);
 
         /// <summary>
-        /// Returns the sampler employed by this parameter
+        /// Returns an IEnumerable that iterates over each sampler field in this parameter
-        public override ISampler[] samplers => new []{ value };
+        public override IEnumerable<ISampler> samplers
+        {
+            get { yield return value; }
+        }
 
         /// <summary>
         /// Generates a float sample

com.unity.perception/Runtime/Randomization/Parameters/ParameterTypes/IntegerParameter.cs

 using System;
+using System.Collections.Generic;
 using Unity.Burst;
 using Unity.Collections;
 using Unity.Jobs;
         [SerializeReference] public ISampler value = new UniformSampler(0f, 1f);
 
         /// <summary>
-        /// Returns the sampler employed by this parameter
+        /// Returns an IEnumerable that iterates over each sampler field in this parameter
-        public override ISampler[] samplers => new[] { value };
+        public override IEnumerable<ISampler> samplers
+        {
+            get { yield return value; }
+        }
 
         /// <summary>
         /// Generates an integer sample

com.unity.perception/Runtime/Randomization/Parameters/ParameterTypes/Vector2Parameter.cs

 using System;
+using System.Collections.Generic;
 using Unity.Burst;
 using Unity.Collections;
 using Unity.Jobs;
         [SerializeReference] public ISampler y = new UniformSampler(0f, 1f);
 
         /// <summary>
-        /// Returns the samplers employed by this parameter
+        /// Returns an IEnumerable that iterates over each sampler field in this parameter
-        public override ISampler[] samplers => new []{ x, y };
+        public override IEnumerable<ISampler> samplers
+        {
+            get
+            {
+                yield return x;
+                yield return y;
+            }
+        }
 
         /// <summary>
         /// Generates a Vector2 sample

com.unity.perception/Runtime/Randomization/Parameters/ParameterTypes/Vector3Parameter.cs

 using System;
+using System.Collections.Generic;
 using Unity.Burst;
 using Unity.Collections;
 using Unity.Jobs;
         [SerializeReference] public ISampler z = new UniformSampler(0f, 1f);
 
         /// <summary>
-        /// Returns the samplers employed by this parameter
+        /// Returns an IEnumerable that iterates over each sampler field in this parameter
-        public override ISampler[] samplers => new []{ x, y, z };
+        public override IEnumerable<ISampler> samplers
+        {
+            get
+            {
+                yield return x;
+                yield return y;
+                yield return z;
+            }
+        }
 
         /// <summary>
         /// Generates a Vector3 sample

com.unity.perception/Runtime/Randomization/Parameters/ParameterTypes/Vector4Parameter.cs

 using System;
+using System.Collections.Generic;
 using Unity.Burst;
 using Unity.Collections;
 using Unity.Jobs;
         [SerializeReference] public ISampler w = new UniformSampler(0f, 1f);
 
         /// <summary>
-        /// The sampler used the samplers employed by this parameter
+        /// Returns an IEnumerable that iterates over each sampler field in this parameter
-        public override ISampler[] samplers => new []{ x, y, z, w };
+        public override IEnumerable<ISampler> samplers
+        {
+            get
+            {
+                yield return x;
+                yield return y;
+                yield return z;
+                yield return w;
+            }
+        }
 
         /// <summary>
         /// Generates a Vector4 sample