public boolean isFieldValid() {
		if (required && getText().isEmpty()) {
			return false;
		}

		if (verifier != null) {
			if (!verifier.verify(this)) {
				return false;
			}
		}

		return true;
	}
Returns true if the field contains valid input.

@return true if valid, false otherwise
Ghidra/Framework/Docking/src/main/java/docking/widgets/textfield/HintTextField.java