public Builder clearMinLength() {
      bitField0_ = (bitField0_ & ~0x00020000);
      minLength_ = 0L;
      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>

@return This builder for chaining.
java-vertexai/proto-google-cloud-vertexai-v1/src/main/java/com/google/cloud/vertexai/api/Schema.java