bool containsValue(
Object value
)

Returns true if this map contains the given value.

Returns true if any of the values in the map are equal to value according to the == operator.

Source

/**
 * Returns true if this map contains the given [value].
 *
 * Returns true if any of the values in the map are equal to `value`
 * according to the `==` operator.
 */
bool containsValue(Object value);