@Override
	byte getFieldType() {
		return getIndexFieldType(indexedField, primaryKey);
	}
Construct a new {@link IndexField} instance for the given indexValue and 
associated primary key.  These fields are verified against this instance to 
ensure that they are of the correct type.
@param indexValue column field value to be indexed
@param key primary key associated with indexValue
@return new IndexField instance
Ghidra/Framework/DB/src/main/java/db/IndexField.java