public boolean hasCallingConvention(String ccName) {
		return program.getFunctionManager().getCallingConvention(ccName) != null;
	}
Returns true if the specified calling convention is defined for the program.
@param ccName calling convention name
@return true if the specified calling convention is defined for the program
Ghidra/Features/Base/src/main/java/ghidra/app/util/bin/format/golang/rtti/GoRttiMapper.java