public Builder setMinLength(long value) {

      minLength_ = value;
      bitField0_ |= 0x00020000;
      onChanged();
      return this;
    }
<pre>
Optional. SCHEMA FIELDS FOR TYPE STRING
Minimum length of the Type.STRING
</pre>

<code>int64 min_length = 18 [(.google.api.field_behavior) = OPTIONAL];</code>

@param value The minLength to set.
@return This builder for chaining.
java-vertexai/proto-google-cloud-vertexai-v1/src/main/java/com/google/cloud/vertexai/api/Schema.java