private void visitFieldInsn(
            final int opcode, final String owner, final String name, final String descriptor) {
        lastBytecodeOffset = code.length;
        // Add the instruction to the bytecode of the method.
        Symbol fieldrefSymbol = symbolTable.addConstantMemberReference(/*CONSTANT_FIELDREF_TAG*/ 9, owner, name, descriptor);
        code.put12(opcode, fieldrefSymbol.index);
        // If needed, update the maximum stack size and number of locals, and stack map frames.
        if (currentBasicBlock != null) {
            currentBasicBlock.frame.execute(opcode, 0, fieldrefSymbol, symbolTable);
        }
    }
Constructs a new {@link MethodWriter}.

@param symbolTable where the constants used in this AnnotationWriter must be stored.
@param access      the method's access flags (see {@link Opcodes}).
@param name        the method's name.
@param descriptor  the method's descriptor (see {@link Type}).
core/src/main/java/com/alibaba/fastjson2/internal/asm/MethodWriter.java