public boolean isValidRtti1Pointer(Program program, Address startAddress, int pointerIndex,
			boolean overwriteInstructions, boolean overwriteDefinedData) {
		return isValidRtti1Pointer(program, startAddress, pointerIndex,
			convertValidationOptions(overwriteInstructions, overwriteDefinedData));
	}
Determines if the RTTI 1 pointer in the RTTI2 structure is valid.
@param program the program
@param startAddress the address of the RTTI 2 structure
@param pointerIndex index of the element in the array that makes up the RTTI 2.
@param overwriteInstructions true indicates that existing instructions can be overwritten 
by this data type.
@param overwriteDefinedData true indicates that existing defined data can be overwritten 
by this data type.
@return true if the indicated RTTI1 pointer is valid.
Ghidra/Features/Base/src/main/java/ghidra/app/util/datatype/microsoft/RTTI2DataType.java