public boolean hasFunctionIndication() {
		return (flagByte & FUNCTION_INDICATION) != 0x0000;
	}
Returns true if seems like a function.  Not necessary, but (seems) sufficient, to indicate a
 function (this is Ghidra functionality not specified in PDB API)
@return true if function indicated
Ghidra/Features/PDB/src/main/java/ghidra/app/util/bin/format/pdb2/pdbreader/symbol/ProcedureFlags.java