public String getCallingConventionName() {
		return callingConventionName;
	}
Create a function instance from the information found in the specified DIEA.

@param diea DW_TAG_subprogram {@link DIEAggregate}
@return new {@link DWARFFunction}, or null if invalid DWARF information 
@throws IOException if error accessing attribute values
@throws DWARFExpressionException if error accessing attribute values
Ghidra/Features/Base/src/main/java/ghidra/app/util/bin/format/dwarf/DWARFFunction.java