Multiplication operators bind strongest, followed by addition
operators, comparison operators, <code>&amp;&amp;</code> (logical AND),
and finally <code>||</code> (logical OR):
</p>

<pre class="grammar">
Precedence    Operator
    5             *  /  %  &lt;&lt;  &gt;&gt;  &amp;  &amp;^
    4             +  -  |  ^
    3             ==  !=  &lt;  &lt;=  &gt;  &gt;=

- [`KT-35981`](https://youtrack.jetbrains.com/issue/KT-35981) No smart cast and UNSAFE_CALL error when using not() function instead of inverse operator
- [`KT-33132`](https://youtrack.jetbrains.com/issue/KT-33132) Cannot override the equals operator twice (in a class and its subclass) unless omitting the operator keyword in the subclass

		}

		// empty toleration key with Exists operator and empty value means match all taints
		if len(toleration.Key) == 0 && toleration.Operator != core.TolerationOpExists {
			allErrors = append(allErrors, field.Invalid(idxPath.Child("operator"), toleration.Operator,
				"operator must be Exists when `key` is empty, which means \"match all values and all keys\""))
		}

// the triple <key,value,effect> using the matching operator <operator>.
type Toleration struct {
	// Key is the taint key that the toleration applies to. Empty means match all taint keys.
	// If the key is empty, operator must be Exists; this combination means to match all values and all keys.
	// +optional
	Key string
	// Operator represents a key's relationship to the value.
	// Valid operators are Exists and Equal. Defaults to Equal.

// the triple <key,value,effect> using the matching operator <operator>.
type Toleration struct {
	// Key is the taint key that the toleration applies to. Empty means match all taint keys.
	// If the key is empty, operator must be Exists; this combination means to match all values and all keys.
	// +optional
	Key string `json:"key,omitempty" protobuf:"bytes,1,opt,name=key"`
	// Operator represents a key's relationship to the value.

// the triple <key,value,effect> using the matching operator <operator>.
message Toleration {
  // Key is the taint key that the toleration applies to. Empty means match all taint keys.
  // If the key is empty, operator must be Exists; this combination means to match all values and all keys.
  // +optional
  optional string key = 1;

  // Operator represents a key's relationship to the value.

	"key":               "Key is the taint key that the toleration applies to. Empty means match all taint keys. If the key is empty, operator must be Exists; this combination means to match all values and all keys.",

                                        type: string
                                      operator:
                                        description: operator represents a key's relationship
                                          to a set of values. Valid operators are
                                          In, NotIn, Exists and DoesNotExist.
                                        type: string

            "type": "string"
          },
          "operator": {

// the triple <key,value,effect> using the matching operator <operator>.
message Toleration {
  // Key is the taint key that the toleration applies to. Empty means match all taint keys.
  // If the key is empty, operator must be Exists; this combination means to match all values and all keys.
  // +optional
  optional string key = 1;

  // Operator represents a key's relationship to the value.